[jdk21u] RFR: 8317039: Enable specifying the JDK used to run jtreg [v2]

[Shivangi Gupta]

> This contains the changes of this bug also.
> https://bugs.openjdk.org/browse/JDK-8317807
> 
> Mach5 testing- https://mach5.us.oracle.com/mdash/jobs/sshivang-jdk21u-20231116-1225-2141342

Shivangi Gupta has updated the pull request incrementally with two additional commits since the last revision:

 - Adding new line for GHA
 - Adding new line for GHA

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

Changes:
  - all: https://git.openjdk.org/jdk21u/pull/374/files
  - new: https://git.openjdk.org/jdk21u/pull/374/files/f6384d69..2342741d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u&pr=374&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u&pr=374&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u/pull/374.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/374/head:pull/374

PR: https://git.openjdk.org/jdk21u/pull/374