[jdk21u-dev] RFR: 8303773: Replace "main.wrapper" with "test.thread.factory" property in test code [v2]

[Goetz Lindenmaier]

> I backport this to streamline testing in 21.
> I verified all files where respective tests sit nearby. Others will be used in SAP nightly testing.

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/jdk21u-dev/pull/444/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/444/files/267a28d1..267a28d1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=444&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=444&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/444.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/444/head:pull/444

PR: https://git.openjdk.org/jdk21u-dev/pull/444