impl(o11y): introduce error attributes #150

Job	Run time
filter	1m 9s
downstream-compatibility-spring-generator	11m 7s
downstream-compatibility (java-bigquery)	4m 4s
downstream-compatibility (java-storage-nio)	3m 45s
downstream-compatibility (java-pubsublite)	3m 20s
downstream-compatibility (java-bigtable)	7m 38s
downstream-compatibility (java-pubsub)	3m 24s
downstream-compatibility (java-firestore)	3m 36s
downstream-compatibility (java-spanner)	5m 36s
downstream-compatibility (java-spanner-jdbc)	3m 43s
downstream-compatibility (java-storage)	5m 32s
	52m 54s

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