chore: Add & improve concurrent tests #3984

Job	Run time
linux (jammy, 5.9)	9m 47s
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	9m 39s
linux (jammy, 6.0)	8m 54s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	10m 54s
linux (amazonlinux2, 5.9)	9m 3s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	10m 36s
linux (amazonlinux2, 6.0)	8m 49s
apple (macos-14, Xcode_15.2, platform=macOS)	9m 51s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	7m 21s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	6m 8s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	8m 18s
apple (macos-15, Xcode_16.1, platform=macOS)	7m 35s
	1h 46m 55s

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