RFR: 8341000: Open source some of the AWT Window tests [v4]

[Jayathirth D V]

> Clean up and open source some of the AWT window tests.
> Automated test `InvalidFocusLostEventTest.java` is verified in our CI also and it passes on all platforms.

Jayathirth D V has updated the pull request incrementally with one additional commit since the last revision:

  Remove failed flag

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21281/files
  - new: https://git.openjdk.org/jdk/pull/21281/files/dfdc7d7c..5b8c153f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21281&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21281&range=02-03

  Stats: 5 lines in 1 file changed: 0 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21281.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21281/head:pull/21281

PR: https://git.openjdk.org/jdk/pull/21281