Remove board finder, add support for AXP2101 and T-Beam-S3-Core #778

Job	Run time
Run cppcheck	2m 8s
Formatting Check	36s
Compile Firmware (heltec-v1)	1m 17s
Run cppcheck in Docker	9s
Compile Firmware (tlora-v1)	1m 34s
Compile Firmware (tbeam)	1m 21s
Compile Firmware (t_internet_poe)	1m 26s
Compile Firmware (heltec-v3)	1m 31s
Compile Firmware (tlora-v2)	1m 22s
Compile Firmware (heltec-v2_0)	1m 27s
Compile Firmware (tbeam-s3-core)	1m 34s
Compile Firmware (tbeam_axp2101)	1m 18s
	15m 43s

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