http2: improve coordination between StreamResetReason and HTTP2 RST_STREAM error codes #36203
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Commit Message: http2: improve coordination between StreamResetReason and HTTP2 RST_STREAM error codes
Additional Description: See linked issue. This PR makes locally-originated resets use more reasonable HTTP2 error codes, especially focusing on not using NO_ERROR where inappropriate. It also improves the translation of HTTP2 error codes into StreamResetReasons for remote-originated HTTP2 resets. An integration test is included which tests the scenario outlined in the linked issue.
Risk Level: medium. this may change behavior for existing http2 clients.
Testing: included, may need more (?)
Docs Changes: n/a
Release Notes: included
Fixes #36200