Remove board finder, add support for AXP2101 and T-Beam-S3-Core #776

Job	Run time
Formatting Check	32s
Run cppcheck	2m 8s
Run cppcheck in Docker	15s
Compile Firmware (heltec-v1)	1m 12s
Compile Firmware (tlora-v1)	1m 20s
Compile Firmware (tbeam)	1m 20s
Compile Firmware (t_internet_poe)	1m 12s
Compile Firmware (heltec-v3)	1m 40s
Compile Firmware (tlora-v2)	1m 11s
Compile Firmware (heltec-v2_0)	1m 19s
Compile Firmware (tbeam-s3-core)	1m 37s
Compile Firmware (tbeam_axp2101)	1m 11s
	14m 57s

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