Add an option to force IDF's default UART clock source #3823

Job	Run time
Generate matrix	4s
Push event file	3s
Build (validation, esp32c3) / Build validation tests for esp32c3	1m 20s
Build (validation, esp32) / Build validation tests for esp32	1m 20s
Build (validation, esp32h2) / Build validation tests for esp32h2	1m 19s
Build (validation, esp32p4) / Build validation tests for esp32p4	1m 19s
Build (validation, esp32c6) / Build validation tests for esp32c6	1m 21s
Build (validation, esp32s2) / Build validation tests for esp32s2	1m 18s
Build (validation, esp32s3) / Build validation tests for esp32s3	1m 20s
QEMU	1s
Hardware	1s
	9m 26s

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