RFR: 8319540: GC: Make TestSelectDefaultGC use createTestJavaProcessBuilder

[Ramkumar Sunderbabu]

Make TestSelectDefaultGC forward VM/JAVA_OPTIONS.

Testing:
Tiers 1 to 5
Ran with all flag combinations in CI

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Commit messages:
 - 8319540: GC: Make TestSelectDefaultGC use createTestJavaProcessBuilder

Changes: https://git.openjdk.org/jdk/pull/28422/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28422&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319540
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28422.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28422/head:pull/28422

PR: https://git.openjdk.org/jdk/pull/28422