[jdk21u-dev] RFR: 8317358: G1: Make TestMaxNewSize use createTestJvm

[Goetz Lindenmaier]

I backport this to keep the 21u test suite up-to-date. This will simplify future test backports.

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Commit messages:
 - Backport 1a098356dd3a157b12c2b5c527e61c8a628bdb2d

Changes: https://git.openjdk.org/jdk21u-dev/pull/85/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=85&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317358
  Stats: 33 lines in 1 file changed: 3 ins; 23 del; 7 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/85.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/85/head:pull/85

PR: https://git.openjdk.org/jdk21u-dev/pull/85