deps: update dependency com.google.cloud.opentelemetry:detector-resources-support to v0.29.0 #6965

Job	Run time
build (11)	12m 19s
build (17)	12m 58s
build(21) except self-service clients	11m 38s
build(8) except for gapic-generator-java	4m 0s
lint	37s
build(8) for gapic-generator-java	9m 52s
compatibility	1m 36s
dependency_analyzer_unit_test	15s
gapic-generator-java-bom	2m 0s
showcase (11)	4m 8s
showcase-clirr	3m 4s
showcase (17)	4m 21s
showcase-native	8m 18s
unmanaged_dependency_check	5m 42s
	1h 20m 48s

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