[jdk17u-dev] RFR: 8287596: Reorg jdk.test.lib.util.ForceGC [v2]

[Goetz Lindenmaier]

> I backport this test infra improvement to keep 17 close to 21. 
> It also simplifies backport of  JDK-8300727.
> 
> Clean except of a row of files left out because they are not in 17.
> I could not find another call to await of ForceGC in the tests.
> Will mark as clean.

Goetz Lindenmaier has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1861/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1861/files/28957c83..28957c83

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1861&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1861&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1861.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1861/head:pull/1861

PR: https://git.openjdk.org/jdk17u-dev/pull/1861