[whatwg/streams] Add support for writablestream owning type (PR #1272)

Implement part of streams-for-raw-video-explainer.md.

- [ ] At least two implementers are interested (and none opposed):
   * Chrome
   * Safari
   * Firefox
- [ ] [Tests](https://github.com/web-platform-tests/wpt) are written and can be reviewed and commented upon at:
   * TBD

(See [WHATWG Working Mode: Changes](https://whatwg.org/working-mode#changes) for more details.)


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<a href="https://whatpr.org/streams/1271.html" title="Last updated on Apr 14, 2023, 12:47 PM UTC (cb9c2a1)">Preview</a> | <a href="https://whatpr.org/streams/1271/2942e89...cb9c2a1.html" title="Last updated on Apr 14, 2023, 12:47 PM UTC (cb9c2a1)">Diff</a>
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/streams/pull/1272

-- Commit Summary --

  * Add support for a new ReadableStream "owning" type.
  * Add writable stream owning type
  * Owning WritableStream reference implementation
  * PipeTo initial implementation

-- File Changes --

    M .github/workflows/test.yml (2)
    M index.bs (171)
    M reference-implementation/lib/ReadableStream-impl.js (2)
    M reference-implementation/lib/ReadableStreamDefaultController-impl.js (5)
    M reference-implementation/lib/ReadableStreamDefaultController.webidl (6)
    M reference-implementation/lib/UnderlyingSink.webidl (4)
    M reference-implementation/lib/UnderlyingSource.webidl (2)
    M reference-implementation/lib/WritableStream-impl.js (2)
    M reference-implementation/lib/WritableStreamDefaultWriter-impl.js (5)
    M reference-implementation/lib/WritableStreamDefaultWriter.webidl (6)
    M reference-implementation/lib/abstract-ops/miscellaneous.js (15)
    M reference-implementation/lib/abstract-ops/queue-with-sizes.js (20)
    M reference-implementation/lib/abstract-ops/readable-streams.js (40)
    M reference-implementation/lib/abstract-ops/transform-streams.js (2)
    M reference-implementation/lib/abstract-ops/writable-streams.js (13)
    M reference-implementation/run-web-platform-tests.js (5)
    M reference-implementation/web-platform-tests (2)

-- Patch Links --

https://github.com/whatwg/streams/pull/1272.patch
https://github.com/whatwg/streams/pull/1272.diff

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