[jdk21u-dev] RFR: 8340078: Open source several 2D tests

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

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Commit messages:
 - Backport 88a1c0550e435888c571d32c577fd697652e5620

Changes: https://git.openjdk.org/jdk21u-dev/pull/1378/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1378&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340078
  Stats: 484 lines in 5 files changed: 484 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1378.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1378/head:pull/1378

PR: https://git.openjdk.org/jdk21u-dev/pull/1378