RFR: 8354493: Opensource Several MultiScreen and Insets related tests [v3]

[Abhishek Kumar]

> Several multi screen related Applet tests are converted to manual and open sourced.

Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:

  Remove unused variable

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24654/files
  - new: https://git.openjdk.org/jdk/pull/24654/files/f16a018c..e07c51a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24654&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24654&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24654.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24654/head:pull/24654

PR: https://git.openjdk.org/jdk/pull/24654