RFR: 8332362: Implement os::committed_in_range for MacOS and AIX

[Robert Toyonaga]

### Summary
This change adds `os::committed_in_range` to `src/hotspot/os/posix/os_posix.cpp` so that AIX and MacOS can use it. It is mostly the same as the prior implementation in `os_linux.cpp`, but takes into account AIX may have unaligned stacks and variable page sizes, and that mincore uses a different argument type on linux.  This will allow AIX and MacOS to report true liveness information for thread stacks reported by NMT. Previously this was only possible on Windows and Linux.

**Testing**
- `TestAlwaysPreTouchStacks.java` is updated to also test the case when stacks are large but mostly not paged in. 
- A few new unit tests in `test_committed_virtualmemory.cpp` to check`os::committed_in_range`. I've excluded these tests on Windows because it reports the committed region as fully paged in. 
- tier1

I've tested on Linux and Windows. I don't have a Mac to test on, but the Mac GHA tests are passing. Not yet tested on AIX.

-------------

Commit messages:
 - Simplify. Remove AIX specific path. Check alignement on AIX too.
 - Implement os::committed_in_range for posix. Add tests.

Changes: https://git.openjdk.org/jdk/pull/19455/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19455&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332362
  Stats: 277 lines in 5 files changed: 183 ins; 83 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/19455.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19455/head:pull/19455

PR: https://git.openjdk.org/jdk/pull/19455