RFR: 8354928: Clean up and open source some miscellaneous AWT tests [v3]

[Alexander Zuev]

> Clean up and open source some tests related to event processing in AWT library.

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

  Update HWWheelScroll.java
  
  Set title on file dialog owner frame.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24755/files
  - new: https://git.openjdk.org/jdk/pull/24755/files/1ae50494..fe71e17e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24755&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24755&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24755.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24755/head:pull/24755

PR: https://git.openjdk.org/jdk/pull/24755