RFR: 8370254: Add VM_MEMORY_JAVA mmap tag to MacOS mmap calls [v5]

[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 incrementally with one additional commit since the last revision:

  move is_memory_tagged_as_java to common to reduce duplication

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27868/files
  - new: https://git.openjdk.org/jdk/pull/27868/files/ab1a90d0..2322badf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27868&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27868&range=03-04

  Stats: 122 lines in 4 files changed: 43 ins; 74 del; 5 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