[jdk21u-dev] RFR: 8327873: Convert javax/swing/border/Test4247606.java applet test to main

[Goetz Lindenmaier]

I backport this for parity with 21.0.9-oracle

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Commit messages:
 - Backport d4ec783108828efd158c749f37e4220bb1df86fc

Changes: https://git.openjdk.org/jdk21u-dev/pull/2034/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2034&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327873
  Stats: 76 lines in 2 files changed: 28 ins; 42 del; 6 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2034.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2034/head:pull/2034

PR: https://git.openjdk.org/jdk21u-dev/pull/2034