Bump FluentAssertions from 6.12.1 to 7.0.0 #2475

Job	Run time
Integration OpenSearch (2.16.0)	7m 9s
Integration OpenSearch Unreleased (1.x, 11)	4m 31s
Integration OpenSearch (2.14.0)	6m 48s
Integration OpenSearch Unreleased (2.x, 17)	18m 19s
Integration OpenSearch (2.12.0)	6m 22s
Integration OpenSearch Unreleased (main, 21)	17m 46s
Integration OpenSearch (2.10.0)	7m 9s
Integration OpenSearch (2.8.0)	6m 51s
Integration OpenSearch (2.6.0)	5m 22s
Integration OpenSearch (2.4.1)	4m 44s
Integration OpenSearch (2.2.1)	4m 36s
Integration OpenSearch (2.0.1)	4m 38s
Integration OpenSearch (1.3.14)	5m 19s
Integration OpenSearch (1.2.4)	4m 55s
Integration OpenSearch (1.1.0)	4m 46s
	1h 49m 15s

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