RFR: JDK-8323695 RenderPerf (2D) enhancements (23.12)

[Laurent Bourgès]

- new executor modes (buffer & volatile)
- support parallel rendering on several frames and / or screens
- added robot calibration + optionally use rounded duration to min frame latency (120Hz)
- give more statistics in verbose (-v)
- added new command-line arguments
- added version + help information

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Commit messages:
 - RenderPerf 23.12 enhancements:

Changes: https://git.openjdk.org/jdk/pull/17408/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17408&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323695
  Stats: 1533 lines in 1 file changed: 1236 ins; 61 del; 236 mod
  Patch: https://git.openjdk.org/jdk/pull/17408.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17408/head:pull/17408

PR: https://git.openjdk.org/jdk/pull/17408