fix: exclude path_to_yaml when compares configs #6043

Job	Run time
build(21) except self-service clients	11m 6s
build(8) for gapic-generator-java	9m 34s
build(8) except for gapic-generator-java	4m 14s
lint	23s
compatibility	1m 41s
build (11)	12m 32s
gapic-generator-java-bom	1m 53s
build (17)	12m 42s
showcase-clirr	2m 59s
showcase (11)	3m 59s
showcase-native	8m 16s
showcase (17)	4m 4s
unmanaged_dependency_check	3m 57s
dependency_analyzer_unit_test	15s
	1h 17m 35s

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