Remove board finder, add support for AXP2101 and T-Beam-S3-Core #777

Job	Run time
Run cppcheck in Docker	9s
Compile Firmware (heltec-v1)	1m 15s
Run cppcheck	2m 14s
Formatting Check	29s
Compile Firmware (tlora-v1)	1m 17s
Compile Firmware (tbeam)	1m 27s
Compile Firmware (t_internet_poe)	1m 18s
Compile Firmware (heltec-v3)	1m 29s
Compile Firmware (tlora-v2)	1m 15s
Compile Firmware (heltec-v2_0)	1m 20s
Compile Firmware (tbeam-s3-core)	1m 33s
Compile Firmware (tbeam_axp2101)	1m 17s
	15m 3s

Provide feedback