tests: Add retry metrics tests to ITOtelGoldenMetrics #601

Job	Run time
filter	1m 3s
downstream-compatibility-spring-generator	10m 48s
downstream-compatibility (java-pubsublite)	3m 16s
downstream-compatibility (java-firestore)	3m 46s
downstream-compatibility (java-spanner-jdbc)	3m 48s
downstream-compatibility (java-bigquery)	4m 19s
downstream-compatibility (java-storage-nio)	3m 18s
downstream-compatibility (java-spanner)	5m 25s
downstream-compatibility (java-pubsub)	2m 55s
downstream-compatibility (java-storage)	5m 46s
downstream-compatibility (java-bigtable)	7m 58s
	52m 22s

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