RFR: 8319873: Add windows implementation for jcmd System.map and System.dump_map

[Simon Tooke]

This is a port of [JDK-8318636](https://github.com/openjdk/jdk/pull/16301) to Windows.

System.map and System.dump_map are implemented using the Windows API and provide roughly the same information in the same format.  Most of the heavy lifting was implemented by @tstuefe in #16301 - this PR adds the Windows implementation and enables the common code for Windows 64 bit.
 
[Sample output (with NMT enabled)](https://github.com/user-attachments/files/16663332/vm_memory_map_760.txt)

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Commit messages:
 - Merge remote-tracking branch 'upstream' into pr_windows_system_dump
 - fix trailing whitespace issues
 - fix whitespace issues
 - formatting tweak
 - Merge branch 'openjdk:master' into pr_windows_system_dump
 - fix OS detection
 - cleanup for PR
 - enabled jtreg tests on Windows
 - Merge branch 'openjdk:master' into pr_windows_system_dump
 - some PR cleanup
 - ... and 2 more: https://git.openjdk.org/jdk/compare/e07a5b66...5c401a36

Changes: https://git.openjdk.org/jdk/pull/20597/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20597&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319873
  Stats: 317 lines in 8 files changed: 303 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/20597.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20597/head:pull/20597

PR: https://git.openjdk.org/jdk/pull/20597