RFR: 8342996: Enhance Attach API to support arbitrary length arguments - OSX

[Alex Menkov]

The fix updates client side of OSX implementation to support Attach API v2.
Server side is shared with Linux and was updated by #22223.
The changes are identical to client-side changes for Linux from #22223.

Testing: tier1,tier2,tier3,tier4,hs-tier5-svc

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Commit messages:
 - attach_v2_osx

Changes: https://git.openjdk.org/jdk/pull/22907/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22907&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342996
  Stats: 52 lines in 1 file changed: 15 ins; 26 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/22907.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22907/head:pull/22907

PR: https://git.openjdk.org/jdk/pull/22907