RFR: 8341258: Open source few various AWT tests - Set1

[Damon Nguyen]

Following tests are added as part of this PR:

./java/awt/GradientPaint/JerkyGradient.java - MANUAL
./java/awt/GradientPaint/ShearTest.java - MANUAL
./java/awt/CardLayout/RemoveComponentTest/RemoveComponentTest.java - MANUAL

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/21338/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21338&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341258
  Stats: 428 lines in 3 files changed: 428 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21338.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21338/head:pull/21338

PR: https://git.openjdk.org/jdk/pull/21338