[jdk21u-dev] RFR: 8328247: Remove redundant dir for tests converted from applet to main

[Satyen Subramaniam]

Backporting JDK-8328247: Remove redundant dir for tests converted from applet to main. Renames three javax swing tests, as per change accepted by Oracle. 

Notably, this change also adapts JDK-8355333: Some Problem list entries point to non-existent / wrong files, to ensure that the renamed files are correctly excluded. I'm also removing the PrintToFileTest tests from the exclude list (since these only run on windows anyway). The `ScrollPaneEventType.java` test hasn't been backported yet (I'll follow up with another PR doing so and excluding as needed), so I've left that change out.

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 32a597b36f994d6e720e0576ad110dac4a5304fe
 - Backport ece4124f25f676da9bf2d1b7fd8e4394dd7d31af

Changes: https://git.openjdk.org/jdk21u-dev/pull/2260/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2260&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328247
  Stats: 4 lines in 4 files changed: 0 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2260.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2260/head:pull/2260

PR: https://git.openjdk.org/jdk21u-dev/pull/2260