RFR: 8328384: Convert java/awt/FileDialog/FileDialogOpenDirTest test to main [v5]

[Alexander Zuev]

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

Alexander Zuev has updated the pull request incrementally with two additional commits since the last revision:

 - Moving toolkit checkto the beginning of the main method.
 - Update test/jdk/java/awt/FileDialog/FileDialogOpenDirTest.java
   
   Co-authored-by: Aleksandr Zvegintsev <77687766+azvegint at users.noreply.github.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18361/files
  - new: https://git.openjdk.org/jdk/pull/18361/files/6dd4e7f9..849ae794

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18361&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18361&range=03-04

  Stats: 11 lines in 1 file changed: 5 ins; 5 del; 1 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