impl(o11y): introduce error attributes #430

Job	Run time
filter	1m 1s
build(8) except for gapic-generator-java	3m 54s
build(8) for showcase	9m 41s
build (11)	14m 12s
build (17)	13m 58s
build(25) except self-service clients	12m 43s
unmanaged_dependency_check	10m 20s
build(21) except self-service clients	11m 55s
dependency_analyzer_unit_test	1m 18s
showcase-clirr	5m 6s
build(8) for gapic-generator-java	10m 52s
gapic-generator-java-bom	2m 31s
showcase (25)	9m 55s
showcase (17)	10m 17s
showcase (11)	10m 42s
showcase (21)	10m 0s
	2h 18m 25s

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