RFR: 8351661: NMT: VMATree should support separate call-stacks for reserve and commit operations [v13]

[Afshin Zafari]

> In NMT detail mode, we need to have separate call-stacks for Reserve and Commit operations.
> This PR adds a second stack to every node that will be used when committing (and uncommitting) the start node of a reserved region.

Afshin Zafari 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 14 additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into _8351661_separate_call_stack_reserve_commit
 - one more test case for overlapping multiple regions
 - 10 cases added for overlapping with multiple regions
 - 24 test-cases added for full coverage of cases.
 - fixed format of the missed Pre
 - Pre conditions are also visualized.
 - fixes. New check_tree impl and visualization.
 - fix the GHA failures.
 - improvements
 - more fixes.
 - ... and 4 more: https://git.openjdk.org/jdk/compare/b5205cb1...b8b40862

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24028/files
  - new: https://git.openjdk.org/jdk/pull/24028/files/4e85b84e..b8b40862

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24028&range=12
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24028&range=11-12

  Stats: 372458 lines in 4345 files changed: 107210 ins; 248074 del; 17174 mod
  Patch: https://git.openjdk.org/jdk/pull/24028.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24028/head:pull/24028

PR: https://git.openjdk.org/jdk/pull/24028