RFR: 8341191: Open source few more AWT FileDialog tests

[Abhishek Kumar]

AWT File Dialog related tests are converted from applet to manual and moved to open.

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Commit messages:
 - Test moved to open

Changes: https://git.openjdk.org/jdk/pull/21277/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21277&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341191
  Stats: 336 lines in 4 files changed: 336 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21277.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21277/head:pull/21277

PR: https://git.openjdk.org/jdk/pull/21277