[jdk21u-dev] RFR: 8327474: Review use of java.io.tmpdir in jdk tests

[Goetz Lindenmaier]

I backport this for parity with 21.0.4-oracle.

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Commit messages:
 - Backport 375bfac8e7ff3f871e2d986876f91a5fba200c83

Changes: https://git.openjdk.org/jdk21u-dev/pull/514/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=514&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327474
  Stats: 193 lines in 11 files changed: 66 ins; 13 del; 114 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/514.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/514/head:pull/514

PR: https://git.openjdk.org/jdk21u-dev/pull/514