Enable StrictConcurrency checking #1215

Job	Run time
macos-all (postgresql@16, scram-sha-256, ~14.3)	3m 45s
linux-unit (swift:5.7-jammy)	24s
linux-unit (swift:5.8-jammy)	2m 41s
macos-all (postgresql@16, scram-sha-256, ~15)	4m 55s
api-breakage	4m 41s
linux-unit (swift:5.9-jammy)	2m 55s
linux-integration-and-dependencies (postgres:16)	9m 6s
linux-unit (swift:5.10-noble)	3m 36s
linux-integration-and-dependencies (postgres:14)	9m 4s
linux-unit (swiftlang/swift:nightly-6.0-jammy)	3m 56s
linux-integration-and-dependencies (postgres:12)	8m 45s
linux-unit (swiftlang/swift:nightly-main-jammy)	3m 49s
	57m 37s

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