RFR: 8349702: jdk.internal.net.http.Http2Connection::putStream needs to provide cause while cancelling stream [v2]

[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.

Volkan Yazici has updated the pull request incrementally with two additional commits since the last revision:

 - Add current issue to the `@bug` list in `AsyncExecutorShutdown`
 - Wrap the cause in an `IOException`
   
   This is okay, because `AsyncExecutorShutdown` walks
   the causal chain while searching for a certain
   exception footprint.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23540/files
  - new: https://git.openjdk.org/jdk/pull/23540/files/f3aab9d0..276cda93

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23540&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23540&range=00-01

  Stats: 8 lines in 2 files changed: 0 ins; 5 del; 3 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