Tests

Disable vendor extensions via user info #1013

Job	Run time
osx (macos-14)	3m 23s
linux (swift:5.8-focal)	4m 9s
linux (swift:5.8-jammy)	3m 46s
osx (macos-15)	3m 36s
linux (swift:5.9-focal)	4m 0s
linux (swift:5.9-jammy)	4m 0s
linux (swift:5.10-focal)	4m 0s
linux (swift:5.10-jammy)	3m 51s
linux (swift:6.0-focal)	2m 10s
linux (swift:6.0-jammy)	2m 10s
linux (swift:6.0-noble)	2m 4s
linux (swiftlang/swift:nightly-focal)	2m 38s
linux (swiftlang/swift:nightly-jammy)	2m 34s
	42m 21s

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