RFR: 8340078: Open source several 2D tests

[Phil Race]

Open source 5 Java2D related rendering tests.

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Commit messages:
 - 8340078

Changes: https://git.openjdk.org/jdk/pull/21045/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21045&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/jdk/pull/21045.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21045/head:pull/21045

PR: https://git.openjdk.org/jdk/pull/21045