[jdk21u-dev] RFR: 8353549: Open source events tests batch2

[Satyen Subramaniam]

Backporting JDK-8353549: Open source events tests batch2. Adds five mouse event tests (dragging and clicking, with additional conditions). Ran GHA Sanity Checks, local Tier 1 and 2, and new tests directly. Patch is clean. Backporting for parity with Oracle.

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Commit messages:
 - Backport cc546e7a283faad40b75183887f6a1f433a2407f

Changes: https://git.openjdk.org/jdk21u-dev/pull/2105/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2105&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353549
  Stats: 1101 lines in 5 files changed: 1101 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2105.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2105/head:pull/2105

PR: https://git.openjdk.org/jdk21u-dev/pull/2105