RFR: 8339570: Add Tidy build support for JDK tests [v13]

[Nizar Benalla]

> Can I get a review for this patch that adds the necessary changes for local support of the `tidy` library.
> 
> The dependency can be retrieved by running `make/devkit/createTidyBundle.sh` on Linux and MacOs systems.
> 
> This dependency is primarily going to be used to test the generated documentation.
> 
> This patch is meant to be integrated before #21272.
> 
> Note: we need to be a very specific revision of `tidy` and cannot use any of the available artifacts, as older versions do not recognize some HTML 5 elements. 
> 
> TIA

Nizar Benalla 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 15 additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/master' into tidy-local-build-support
 - - lower case TIDY_VERSION in lib-tests.m4
   
   - add a few double quotes in createTidyBundle.sh
 - revert changes to RunTestsPrebuiltSpec.gmk
 - Whitespace
 - Slightly cleaner code in `RunTestsPrebuiltSpec.gmk`
 - Remove check in RunTests.gmk, different approach.
   Remove environment_name TIDY_HOME
 - Merge remote-tracking branch 'upstream/master' into tidy-local-build-support
 - - provide tidy to linux-aarch64.
   - add condition to module name for tidy
   - add new condition when passing the path to tidy
 - Add small comment to `createTidyBundle`
 - revert fd95431e and remove `tidy` as a dependency for linux-aarch64. Not needed currently
 - ... and 5 more: https://git.openjdk.org/jdk/compare/d84c0a33...a71aab92

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21341/files
  - new: https://git.openjdk.org/jdk/pull/21341/files/47a67f2e..a71aab92

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21341&range=12
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21341&range=11-12

  Stats: 19228 lines in 596 files changed: 14986 ins; 2014 del; 2228 mod
  Patch: https://git.openjdk.org/jdk/pull/21341.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21341/head:pull/21341

PR: https://git.openjdk.org/jdk/pull/21341