RFR: 8349702: jdk.internal.net.http.Http2Connection::putStream needs to provide cause while cancelling stream

[Volkan Yazici]

Fixes stream cancellation in `Http2Connection::putStream`. See comments in the ticket for details on the issue. `tier1,2` results are attached to the ticket too.

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Commit messages:
 - Check `cause` while cancelling stream in `Http2Connection::putStream`

Changes: https://git.openjdk.org/jdk/pull/23540/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23540&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349702
  Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23540.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23540/head:pull/23540

PR: https://git.openjdk.org/jdk/pull/23540