Add an option to force IDF's default UART clock source #3717

Job	Run time
Generate matrix	3s
Push event file	5s
Build (validation, esp32h2) / Build validation tests for esp32h2	3m 26s
Build (validation, esp32c6) / Build validation tests for esp32c6	4m 22s
Build (validation, esp32) / Build validation tests for esp32	5m 0s
Build (validation, esp32c3) / Build validation tests for esp32c3	3m 42s
Build (validation, esp32p4) / Build validation tests for esp32p4	3m 58s
Build (validation, esp32s2) / Build validation tests for esp32s2	5m 21s
Build (validation, esp32s3) / Build validation tests for esp32s3	5m 35s
QEMU	0s
Hardware	0s
	31m 32s

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