RFR: 8340411: open source several 2D imaging tests

[Phil Race]

open source several 2d imaging related tests.

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Commit messages:
 - 8340411

Changes: https://git.openjdk.org/jdk/pull/21113/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21113&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340411
  Stats: 485 lines in 4 files changed: 485 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21113.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21113/head:pull/21113

PR: https://git.openjdk.org/jdk/pull/21113