impl(o11y): introduce error attributes #275

Job	Run time
filter	1m 3s
downstream-compatibility-spring-generator	11m 10s
downstream-compatibility (java-pubsublite)	3m 24s
downstream-compatibility (java-spanner)	5m 48s
downstream-compatibility (java-spanner-jdbc)	3m 39s
downstream-compatibility (java-bigquery)	4m 9s
downstream-compatibility (java-bigtable)	7m 42s
downstream-compatibility (java-firestore)	3m 30s
downstream-compatibility (java-storage)	5m 45s
downstream-compatibility (java-pubsub)	3m 7s
downstream-compatibility (java-storage-nio)	3m 46s
	53m 3s

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