fix: normalize indentation in owlbot yamls for new libraries #19058

Job	Run time
windows	2m 15s
generation-config-check	1m 47s
lint	2m 31s
gapic-libraries-bom	18m 10s
bulk-filter	1m 6s
enforcer	18m 48s
changes	4s
split-units (sdk-platform-java, 17)	7m 19s
split-units (sdk-platform-java, 21)	6m 29s
split-units (sdk-platform-java, 11)	7m 20s
split-units (sdk-platform-java, 8)	2m 44s
split-units (sdk-platform-java, 25)	6m 20s
units (8)	1m 7s
units (17)	35s
units (25)	36s
units (11)	44s
units (21)	39s
	1h 18m 34s

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