RFR: 8356102: TestJcmdOutput, JcmdWithNMTDisabled and DumpSharedDictionary hs/tier1 tests fail on static-jdk [v2]

[Jiangli Zhou]

> Please review the change to set `-Dcompile.jdk=<jdk>` when launching child processes in TestJcmdOutput, JcmdWithNMTDisabled and DumpSharedDictionary hs/tier1 tests.
> 
> These three tests fail on static-jdk as `jdk.test.lib.JDKToolFinder.getJDKTool()` fails to locate the `jcmd` tool. `JDKToolFinder.getJDKTool()` locates the requested tool from the path specified in 'test.jdk' system property first, then using the path specified in 'compile.jdk' system property. Currently when running jtreg tests on static-jdk, jtreg '-compilejdk' is set to a regular JDK binary. Populating the 'compile.jdk' system property from jtreg when creating the child process would allow `JDKToolFinder.getJDKTool()` (executing in the child process) to locate the tool from 'compile.jdk' path.
> 
> Tested all three tests on static-jdk. All three tests pass with the fix.

Jiangli Zhou has updated the pull request incrementally with one additional commit since the last revision:

  Address David and Thomas comment:
  - Set `-Dcompile.jdk= ...` for child process from `ProcessTools.createJavaProcessBuilder()`.
  - Revert tests.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25018/files
  - new: https://git.openjdk.org/jdk/pull/25018/files/6fd8d7ef..dd23d795

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25018&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25018&range=00-01

  Stats: 13 lines in 4 files changed: 4 ins; 6 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/25018.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25018/head:pull/25018

PR: https://git.openjdk.org/jdk/pull/25018