[Flight Reply] Encode ReadableStream and AsyncIterables
Same as #28847 but in the other direction.
Like other promises, this doesn't actually stream in the outgoing direction. It buffers until the stream is done. This is mainly due to our protocol remains compatible with Safari's lack of outgoing streams until recently.
However, the stream chunks are encoded as separate fields and so does support the busboy streaming on the receiving side.
Comparing: 5fcfd71638401958d437e74f8cf384c4c1ba4665...a638699fafafc11a92d4d02bb6ec8fa82d5e3a88
Critical size changes
Includes critical production bundles, as well as any change greater than 2%:
Significant size changes
Includes any change greater than 0.2%:
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Generated by :no_entry_sign: dangerJS against a638699fafafc11a92d4d02bb6ec8fa82d5e3a88