RFR: 8345745: Update mode of the Attach API communication pipe.

[Alex Menkov]

Please review this small fix to update pipe mode for attach operation communication.
- `FILE_FLAG_FIRST_PIPE_INSTANCE`: there is "retry" logic if pipe creation failed [1], with this flag `CreateNamedPipe` fails when pipe with the same name already exists;
- `PIPE_REJECT_REMOTE_CLIENTS`: attach works only for local processes, the flag adds extra protection from remote connections.

[1]: https://github.com/openjdk/jdk/blob/master/src/jdk.attach/windows/classes/sun/tools/attach/VirtualMachineImpl.java#L93

Testing: tier1..4, hs-tier5-svc

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Commit messages:
 - fix

Changes: https://git.openjdk.org/jdk/pull/25530/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25530&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345745
  Stats: 5 lines in 1 file changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/25530.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25530/head:pull/25530

PR: https://git.openjdk.org/jdk/pull/25530