Remove board finder, add support for AXP2101 and T-Beam-S3-Core #768

Job	Run time
Run cppcheck in Docker	9s
Formatting Check	30s
Run cppcheck	5m 12s
Compile Firmware (heltec-v1)	3m 56s
Compile Firmware (tlora-v1)	1m 43s
Compile Firmware (tbeam)	1m 40s
Compile Firmware (t_internet_poe)	1m 40s
Compile Firmware (heltec-v3)	2m 0s
Compile Firmware (tlora-v2)	1m 41s
Compile Firmware (heltec-v2_0)	1m 43s
Compile Firmware (tbeam-s3-core)	1m 59s
Compile Firmware (tbeam_axp2101)	1m 40s
	23m 53s

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