feat!: Flexible checksum v2 #4006

Job	Run time
linux (jammy, 5.9)	10m 4s
apple (macos-14, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	6m 35s
linux (jammy, 6.0)	8m 13s
apple (macos-14, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	3m 51s
linux (amazonlinux2, 5.9)	8m 12s
apple (macos-14, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	5m 45s
linux (amazonlinux2, 6.0)	7m 51s
apple (macos-14, Xcode_15.2, platform=macOS)	9m 4s
apple (macos-15, Xcode_16.1, platform=iOS Simulator,OS=18.1,name=iPhone 16)	3m 45s
apple (macos-15, Xcode_16.1, platform=tvOS Simulator,OS=18.1,name=Apple TV 4K (3rd generation) (a...	3m 49s
apple (macos-15, Xcode_16.1, platform=visionOS Simulator,OS=2.1,name=Apple Vision Pro)	3m 42s
apple (macos-15, Xcode_16.1, platform=macOS)	6m 32s
	1h 17m 23s

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