Bump AWSSDK.Core from 3.7.400.36 to 3.7.400.40 (#840) #2416

Job	Run time
Integration OpenSearch (2.16.0)	6m 52s
Integration OpenSearch (2.14.0)	6m 49s
Integration OpenSearch (2.12.0)	6m 58s
Integration OpenSearch (2.10.0)	6m 47s
Integration OpenSearch (2.8.0)	6m 40s
Integration OpenSearch (2.6.0)	6m 28s
Integration OpenSearch (2.4.1)	5m 46s
Integration OpenSearch (2.2.1)	4m 36s
Integration OpenSearch (2.0.1)	4m 47s
Integration OpenSearch (1.3.14)	5m 6s
Integration OpenSearch (1.2.4)	4m 27s
Integration OpenSearch (1.1.0)	4m 45s
Integration OpenSearch Unreleased (1.x, 11)	7m 34s
Integration OpenSearch Unreleased (2.x, 17)	17m 19s
Integration OpenSearch Unreleased (main, 21)	16m 30s
	1h 51m 24s

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