RFR: 8340173: Open source some Component/Panel/EventQueue tests - Set2

[Damon Nguyen]

Following tests are added as part of this PR:

1. /java/awt/LightweightComponent/MultipleAddNotifyTest/MultipleAddNotifyTest.java - CONVERTED TO AUTO
2. /java/awt/LightweightComponent/PopupTest/PopupTest.java - MANUAL
3. /java/awt/Panel/PanelRepaint/PanelRepaint.java - MANUAL
4. /java/awt/EventQueue/PushPopDeadlock/PushPopDeadlock.java MANUAL (PROBLEM LISTED)

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/21398/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21398&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340173
  Stats: 760 lines in 5 files changed: 760 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21398.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21398/head:pull/21398

PR: https://git.openjdk.org/jdk/pull/21398