[jdk17u-dev] RFR: 8307297: Move some DnD tests to open

[Goetz Lindenmaier]

I backport this for parity with 17.0.13-oracle.

-------------

Commit messages:
 - Backport 3bf3876185f7b9e7679af3fa22ec20887cd4e498

Changes: https://git.openjdk.org/jdk17u-dev/pull/3052/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3052&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307297
  Stats: 1233 lines in 7 files changed: 1233 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3052.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3052/head:pull/3052

PR: https://git.openjdk.org/jdk17u-dev/pull/3052