[jdk17u-dev] RFR: 8287596: Reorg jdk.test.lib.util.ForceGC [v3]

[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 pull request now contains four commits:

 - Merge branch 'master' into goetz_backport_8287596
 - Backport 82a8bd7e92a1867b0c82f051361938be8610428d
 - Backport a50b06e85124f61b5133189a2a2e461753d5d9e7
 - Backport 2e332c276052554540da0998316a5a99bc350cd6

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Changes: https://git.openjdk.org/jdk17u-dev/pull/1861/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1861&range=02
  Stats: 83 lines in 6 files changed: 13 ins; 34 del; 36 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