Adding specs for new _list/indices and _list/shards APIs #1450

Job	Run time
test-opensearch-spec (version=1.3.17, hub=opensearchproject, tests=default)	1m 24s
test-opensearch-spec (version=2.0.0, hub=opensearchproject, tests=default)	1m 19s
test-opensearch-spec (version=2.16.0, hub=opensearchproject, tests=default)	1m 26s
test-opensearch-spec (version=2.16.0, hub=opensearchproject, tests=plugins/index_state_management)	55s
test-opensearch-spec (version=2.16.0, hub=opensearchproject, tests=plugins/ml)	1m 34s
test-opensearch-spec (version=2.16.0, hub=opensearchproject, tests=routing)	1m 22s
test-opensearch-spec (version=2.16.0, hub=opensearchproject, tests=snapshot)	46s
test-opensearch-spec (version=2.17.0, hub=opensearchproject, tests=plugins/streaming)	1m 4s
test-opensearch-spec (version=2.17.0, hub=opensearchproject, tests=plugins/notifications)	55s
test-opensearch-spec (version=2.17.0, hub=opensearchproject, tests=plugins/query_insights)	50s
test-opensearch-spec (version=2.17.0, hub=opensearchproject, tests=plugins/workload-management)	1m 8s
test-opensearch-spec (version=2.18.0, hub=opensearchstaging, tests=default)	1m 30s
test-opensearch-spec (version=3.0.0, hub=opensearchstaging, tests=default)	1m 15s
merge-coverage	0s
	15m 28s

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