[jdk21u-dev] RFR: 8315097: Rename createJavaProcessBuilder

[Goetz Lindenmaier]

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

I split this into 4 commits:
1. The clean parts.
2. The files I resolved.
3. Follow up change JDK-8318964 needed.
4. Edit some files that were removed after 21.

Details:

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Commit messages:
 - Adapt some remaining tests
 - Backport of follow up 8318964, clean except for file missing in 21
 - Resolves needed
 - Clean parts

Changes: https://git.openjdk.org/jdk21u-dev/pull/105/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=105&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315097
  Stats: 1580 lines in 566 files changed: 44 ins; 10 del; 1526 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/105.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/105/head:pull/105

PR: https://git.openjdk.org/jdk21u-dev/pull/105