Add opt-out for Streamable HTTP standalone GET stream #3101

Job	Run time
build (ubuntu-latest, Release)	11m 53s
build (ubuntu-latest, Debug)	12m 11s
build (windows-latest, Debug)	16m 5s
build (windows-latest, Release)	18m 20s
build (macos-latest, Debug)	13m 51s
build (macos-latest, Release)	12m 8s
publish-coverage / publish-coverage	1m 1s
	1h 25m 29s

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