[jdk21u-dev] RFR: 8327872: Convert javax/swing/JToolTip/4644444/bug4644444.java applet test to main

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Commit messages:
 - Backport a4a5196351a3c8ce45e2e36d27842194cbfcc5ff

Changes: https://git.openjdk.org/jdk21u-dev/pull/1888/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1888&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327872
  Stats: 461 lines in 3 files changed: 63 ins; 398 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1888.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1888/head:pull/1888

PR: https://git.openjdk.org/jdk21u-dev/pull/1888