RFR: 8370254: Add VM_MEMORY_JAVA mmap tag to MacOS mmap calls [v2]

[Nityanand Rai]

> Add VM_MEMORY_JAVA tag to mmap calls in os_bsd.cpp for better memory tracking of java process on macOs

Nityanand Rai has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Merge branch 'openjdk:master' into macos-vm-tagging
 - 1. Test improved to incorporate os/zgc allocation routines 2. Minor refactor to improve readability
 - remove extra whitespace
 - remove extra whitespace
 - Merge branch 'openjdk:master' into macos-vm-tagging
 - Covered ZGC direct mmap usage for JAVA tagging. Added unit test to validate changes
 - Merge branch 'openjdk:master' into macos-vm-tagging
 - Merge branch 'openjdk:master' into macos-vm-tagging
 - Merge branch 'openjdk:master' into macos-vm-tagging
 - Add VM_MEMORY_JAVA tag to mmap calls in os_bsd.cpp for better memory tracking

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27868/files
  - new: https://git.openjdk.org/jdk/pull/27868/files/1144ca92..1c8b3818

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27868&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27868&range=00-01

  Stats: 73212 lines in 988 files changed: 39905 ins; 27282 del; 6025 mod
  Patch: https://git.openjdk.org/jdk/pull/27868.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27868/head:pull/27868

PR: https://git.openjdk.org/jdk/pull/27868