Do startup-coordination using system events

[erlingrj]

This PR should be merged after the clock-sync PR. It moves the startup coordination over to using the system event queue as well. The only thing that happens before starting the system event queue is that we do the setup of all our connections, blocking, at the assemble of the environment.

[github-actions]

Benchmark results after merging this PR:

Benchmark results

Performance:

PingPongUc:
Best Time: 179.997 msec
Worst Time: 189.040 msec
Median Time: 180.518 msec

PingPongC:
Best Time: 170.675 msec
Worst Time: 178.697 msec
Median Time: 170.802 msec

ReactionLatencyUc:
Best latency: 38519 nsec
Median latency: 60028 nsec
Worst latency: 573816 nsec

ReactionLatencyC:
Best latency: 25715 nsec
Median latency: 60088 nsec
Worst latency: 116117 nsec

Memory usage:

PingPongUc:
text data bss dec hex filename
41498 760 8240 50498 c542 bin/PingPongUc

PingPongC:
text data bss dec hex filename
45826 880 360 47066 b7da bin/PingPongC

ReactionLatencyUc:
text data bss dec hex filename
31549 744 2384 34677 8775 bin/ReactionLatencyUc

ReactionLatencyC:
text data bss dec hex filename
41536 848 360 42744 a6f8 bin/ReactionLatencyC

[github-actions]

Memory usage after merging this PR will be:

Memory Report

action_empty_test_c

	from	to	increase (%)
text	64817	65330	0.79
data	752	752	0.00
bss	12320	12320	0.00
total	77889	78402	0.66

action_microstep_test_c

	from	to	increase (%)
text	65684	66197	0.78
data	760	760	0.00
bss	12384	12384	0.00
total	78828	79341	0.65

action_overwrite_test_c

	from	to	increase (%)
text	65518	66031	0.78
data	752	752	0.00
bss	12384	12384	0.00
total	78654	79167	0.65

action_test_c

	from	to	increase (%)
text	65422	65935	0.78
data	760	760	0.00
bss	12384	12384	0.00
total	78566	79079	0.65

deadline_test_c

	from	to	increase (%)
text	60990	61497	0.83
data	768	768	0.00
bss	11712	11712	0.00
total	73470	73977	0.69

delayed_conn_test_c

	from	to	increase (%)
text	66251	66758	0.77
data	752	752	0.00
bss	13120	13120	0.00
total	80123	80630	0.63

event_payload_pool_test_c

	from	to	increase (%)
text	19170	19093	-0.40
data	624	624	0.00
bss	320	320	0.00
total	20114	20037	-0.38

event_queue_test_c

	from	to	increase (%)
text	28670	28670	0.00
data	728	728	0.00
bss	480	480	0.00
total	29878	29878	0.00

nanopb_test_c

	from	to	increase (%)
text	44010	44010	0.00
data	1800	1800	0.00
bss	320	320	0.00
total	46130	46130	0.00

physical_clock_test_c

	from	to	increase (%)
text	53433	53940	0.95
data	752	752	0.00
bss	928	928	0.00
total	55113	55620	0.92

port_test_c

	from	to	increase (%)
text	66167	66674	0.77
data	752	752	0.00
bss	12992	12992	0.00
total	79911	80418	0.63

reaction_queue_test_c

	from	to	increase (%)
text	27900	27900	0.00
data	728	728	0.00
bss	480	480	0.00
total	29108	29108	0.00

request_shutdown_test_c

	from	to	increase (%)
text	65656	66169	0.78
data	752	752	0.00
bss	12384	12384	0.00
total	78792	79305	0.65

startup_test_c

	from	to	increase (%)
text	60582	61089	0.84
data	760	760	0.00
bss	11712	11712	0.00
total	73054	73561	0.69

tcp_channel_test_c

	from	to	increase (%)
text	98001	98508	0.52
data	2152	2152	0.00
bss	14720	14784	0.43
total	114873	115444	0.50

timer_test_c

	from	to	increase (%)
text	60588	61095	0.84
data	752	752	0.00
bss	11712	11712	0.00
total	73052	73559	0.69

[github-actions]

Coverage after merging system-event into clock-sync3 will be

57.01%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
action.c	77.31%	66.67%	100%	80%	132–133, 24, 42–45, 48, 50–51, 54–57, 63–64, 71–73, 73, 73–76, 82–84
builtin_triggers.c	90.91%	70%	100%	96.77%	14, 18, 40, 43
clock_synchronization.c	0%	0%	0%	0%	101–104, 104, 104–110, 110, 110–113, 116, 118, 120, 122, 122, 122–124, 124, 124, 127, 127, 127–128, 131–137, 137, 137–138, 142, 144–149, 15, 150, 150, 150, 152, 155–159, 16, 160, 160, 160–161, 163, 165, 168–169, 171–173, 173, 173–174, 174, 174–179, 18, 180–183, 183, 183–184, 186, 189, 19, 190, 192–194, 196, 196, 196–197, 199, 20, 202–203, 205–209, 21, 210–212, 212, 212–214, 219–222, 222, 222–224, 226–227, 231–232, 234–235, 235, 235–236, 236, 236–239, 24, 24, 24, 240–244, 244, 244–245, 247, 25, 251, 254–255, 258–259, 26, 260–267, 267, 267–268, 271, 274–277, 280, 280, 280, 280, 280, 280, 280, 280–289, 29, 290–298, 30, 301–302, 304, 308–309, 31, 310–316, 318, 321, 321, 321–322, 326–330, 333, 333, 333–334, 337, 339, 34–37, 39, 39, 39–41, 41, 41–42, 45, 48, 55–56, 58–59, 59, 59–61, 64–67, 69–70, 70, 70–73, 78–80, 80, 80–82, 84–86, 86, 86–88, 88, 88, 88, 88–90, 93–94, 96, 99
connection.c	77.33%	51.16%	100%	86.73%	10, 104, 11, 110, 123–124, 136–137, 14, 14, 143, 145–146, 148, 16–17, 21–22, 22, 22–23, 25, 27–28, 33, 48, 48, 48–49, 55, 60–62, 97
environment.c	79.69%	56.25%	92.31%	86.75%	114–116, 126–128, 14–15, 24, 29–31, 31, 31–32, 38, 46, 50–51, 57–58, 72–73, 77–78
event.c	100%	100%	100%	100%
federated.c	6.76%	3.30%	10%	8.33%	10, 100, 102, 102, 102–103, 105, 105, 105, 105, 105–106, 106, 106–108, 11, 111, 111, 111–113, 115–116, 119–121, 121, 121–122, 122, 122–124, 126, 129, 13, 130, 132–136, 14, 140–142, 144, 144, 144, 146–149, 15, 151–152, 152, 152–153, 155–156, 159, 16, 160, 165–166, 166, 166–167, 169, 171, 171, 171–174, 174, 174, 174, 174, 174–179, 18, 18, 18, 180–183, 183, 183–184, 186–189, 19, 19, 19, 190–194, 198, 201, 201, 201–203, 206, 208, 21, 21, 21, 211–212, 212, 212, 212, 212–217, 219, 22, 220–221, 221, 221–222, 225, 228–229, 23, 23, 23, 230–231, 234–235, 24, 241–243, 25, 256–257, 257, 257–258, 258, 258–259, 259, 259–260, 260, 260–261, 261, 261–262, 262, 262–263, 263, 263, 265, 265, 265–266, 266, 266–267, 267, 267–268, 268, 268–269, 269, 269, 271, 29–30, 34–35, 37–40, 42, 44, 44, 44–45, 45, 45–46, 46, 46–47, 47, 47, 49, 51–54, 56, 56, 56–59, 59, 59–60, 62, 64–65, 65, 65–66, 70, 73–74, 74, 74–75, 77–79, 81, 85–86, 88–90, 93, 95–99
logging.c	88.52%	83.33%	100%	89.36%	25, 38–40, 47, 60–61
network_channel.c	69.23%	62.50%	100%	70.59%	42, 42, 42, 47–50, 59
physical_clock.c	93.62%	62.50%	100%	100%	16, 23, 5
port.c	74.68%	42.86%	100%	91.49%	10, 10, 10, 15, 15, 15–16, 22, 26, 31, 31–33, 33, 33–34, 45, 45, 45–46
queues.c	86.21%	79.03%	100%	88.37%	115–119, 122–123, 140, 145, 151, 29, 29, 33–38, 61–62, 86, 86, 90–95
reaction.c	71.43%	54.55%	100%	80%	15, 17, 21, 28–31, 31, 31–32, 42, 45, 47, 52–53, 53, 53–55, 55, 55–56, 73, 89–91, 91, 91–94, 94, 94–95
reactor.c	69.33%	51.52%	100%	82.28%	10, 101–102, 14–19, 22, 28, 30, 32–37, 37, 37–38, 38, 38, 43, 55, 58–59, 59, 59–60, 60, 60–61, 63, 77–78, 81–82, 82, 82–83, 83, 83–84, 86, 91
serialization.c	37.50%	25%	50%	40%	16–17, 26–27, 33–34, 34, 34–35, 37–38, 41–42, 42, 42–43, 45–46
startup_coordinator.c	0%	0%	0%	0%	100, 103, 105, 108, 110–111, 111, 111, 114–115, 115, 115–117, 120–121, 121, 121–123, 125, 125, 125–129, 129, 129, 13,