Increase health check channel buffer (#17821) #679

Job	Run time
Build and push lite (latest)	5m 5s
Build and push vttestserver (mysql80)	2m 54s
Build and push lite (mysql84)	5m 11s
Build and push vttestserver (mysql84)	2m 59s
Build and push lite (percona80)	4m 48s
Build and push (bullseye, vtadmin)	1m 44s
Build and push (bullseye, vtorc)	1m 9s
Build and push (bullseye, vtgate)	55s
Build and push (bullseye, vttablet)	1m 9s
Build and push (bullseye, mysqlctld)	1m 3s
Build and push (bullseye, mysqlctl)	1m 6s
Build and push (bullseye, vtctl)	57s
Build and push (bullseye, vtctlclient)	54s
Build and push (bullseye, vtctld)	1m 54s
Build and push (bullseye, vtctldclient)	1m 7s
Build and push (bullseye, logrotate)	30s
Build and push (bullseye, logtail)	33s
Build and push (bullseye, vtbackup)	51s
Build and push (bullseye, vtexplain)	57s
Build and push (bookworm, vtadmin)	7m 31s
Build and push (bookworm, vtorc)	1m 7s
Build and push (bookworm, vtgate)	1m 18s
Build and push (bookworm, vttablet)	57s
Build and push (bookworm, mysqlctld)	6m 37s
Build and push (bookworm, mysqlctl)	1m 4s
Build and push (bookworm, vtctl)	1m 2s
Build and push (bookworm, vtctlclient)	1m 13s
Build and push (bookworm, vtctld)	7m 44s
Build and push (bookworm, vtctldclient)	6m 37s
Build and push (bookworm, logrotate)	56s
Build and push (bookworm, logtail)	59s
Build and push (bookworm, vtbackup)	6m 24s
Build and push (bookworm, vtexplain)	59s
Slack Notification if failed	0s
	1h 20m 14s

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