chore: bump smithy version to 1.51 and enable protocol test #3771

Job	Run time
linux (jammy, 5.9)	6m 36s
apple (macos-13, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	23m 13s
linux (jammy, 5.10)	6m 39s
apple (macos-13, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	11m 29s
linux (amazonlinux2, 5.9)	6m 53s
apple (macos-13, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	12m 9s
linux (amazonlinux2, 5.10)	6m 45s
apple (macos-13, Xcode_15.2, platform=OS X)	12m 44s
apple (macos-14, Xcode_16.0, platform=iOS Simulator,OS=18.0,name=iPhone 15)	14m 15s
apple (macos-14, Xcode_16.0, platform=tvOS Simulator,OS=18.0,name=Apple TV 4K (3rd generation) (a...	7m 52s
apple (macos-14, Xcode_16.0, platform=visionOS Simulator,OS=2.0,name=Apple Vision Pro)	13m 4s
apple (macos-14, Xcode_16.0, platform=OS X)	7m 37s
	2h 9m 16s

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