Elide `ios_app_clip` from beta CI (#2481) #6122

Job	Run time
web/samples_index config check	45s
Test Flutter stable on ubuntu-latest	16m 22s
ios-build	9m 3s
Test Flutter stable on macos-latest	24m 42s
Test Flutter stable on windows-latest	25m 11s
Test Flutter beta on ubuntu-latest	10m 18s
Test Flutter beta on macos-latest	17m 22s
Test Flutter beta on windows-latest	17m 49s
Test Flutter master on ubuntu-latest	10m 16s
Test Flutter master on macos-latest	17m 34s
Test Flutter master on windows-latest	16m 50s
	2h 46m 12s

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