RFR: 8328384: Convert java/awt/FileDialog/FileDialogOpenDirTest test to main [v4]

[Alexander Zuev]

> Convert test to main manual;
> Move test to appropriate folder;
> Delete old files;

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Moving test metadata closer to the class definition for better readability;
  Making test automatically skip execution on unsuported toolkit;
  Eliminated the separate frame, moving button inside the PassFailJFrame;
  Corrected test instructions accordingly;

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18361/files
  - new: https://git.openjdk.org/jdk/pull/18361/files/9c9e8fbb..6dd4e7f9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18361&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18361&range=02-03

  Stats: 31 lines in 1 file changed: 9 ins; 14 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/18361.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18361/head:pull/18361

PR: https://git.openjdk.org/jdk/pull/18361