RFR: 8358058: sun/java2d/OpenGL/DrawImageBg.java Test fails intermittently [v2]

[Phil Race]

> Moving to open a number of graphics related tests, originally written to test the OpenGL pipeline.
> These versions are "better behaved" than the versions that were in closed - mostly meaning they now
> do things on the right thread and paint properly on demand.
> As a result they now pass - at least on systems with correct drivers etc.
> There are a few bugs to add to the issue list which I'll do right after submitting this.
> 
> I also extended these tests so as to run with the default pipeline on every system, not just OpenGL.
> This mostly went OK except that I found one of the tests fails on macOS with metal.
> I've had to add a new problem listing for that.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8040230

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27399/files
  - new: https://git.openjdk.org/jdk/pull/27399/files/e9f78262..932563fb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27399&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27399&range=00-01

  Stats: 20 lines in 10 files changed: 0 ins; 0 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/27399.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27399/head:pull/27399

PR: https://git.openjdk.org/jdk/pull/27399