Add support for opting out of streaming HTTP bodies #39

Job	Run time
Cxx interop / Construct Cxx interop matrix	3s
macOS tests / Construct Darwin matrix	2s
Unit tests / Construct unit test matrix	2s
Soundness / Documentation check	1m 9s
Soundness / API breakage check	1m 9s
Soundness / Broken symlinks check	4s
Soundness / Format check	30s
Soundness / License headers check	4s
Soundness / Python lint check	8s
Soundness / Unacceptable language check	5s
Soundness / Shell check	30s
Soundness / YAML lint check	3s
Unit tests / Unit tests / Linux (5.9)	1m 10s
Unit tests / Unit tests / Linux (5.10)	1m 11s
Unit tests / Unit tests / Linux (6.0)	1m 25s
Unit tests / Unit tests / Linux (nightly-next)	1m 45s
Unit tests / Unit tests / Linux (nightly-main)	1m 39s
Cxx interop / Cxx interop / Linux (5.9)	46s
Cxx interop / Cxx interop / Linux (5.10)	52s
Cxx interop / Cxx interop / Linux (6.0)	56s
Cxx interop / Cxx interop / Linux (nightly-next)	1m 5s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 9s
macOS tests / Xcode 16.0	4m 27s
macOS tests / Xcode 16.1	5m 14s
macOS tests / Xcode 16.2	4m 27s
	29m 55s

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