RFR: 8340173: Open source some Component/Panel/EventQueue tests - Set2 [v3]

[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)

Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:

  Review comments again

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21398/files
  - new: https://git.openjdk.org/jdk/pull/21398/files/744b2357..5f94c25a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21398&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21398&range=01-02

  Stats: 16 lines in 2 files changed: 6 ins; 3 del; 7 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