RFR: 8353126: Open source events tests batch1

[Alexander Zvegintsev]

Few more events tests are opensourced:

* test/jdk/java/awt/event/MouseEvent/DragToLightweightTest.java
* test/jdk/java/awt/event/MouseEvent/MouseEnterTest.java

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Commit messages:
 - initial

Changes: https://git.openjdk.org/jdk/pull/24303/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24303&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353126
  Stats: 321 lines in 2 files changed: 321 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24303.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24303/head:pull/24303

PR: https://git.openjdk.org/jdk/pull/24303