[jdk21u-dev] RFR: 8327753: Convert javax/swing/JOptionPane/8024926/bug8024926.java applet to main

[Goetz Lindenmaier]

I backport this for parity with 21.0.9-oracle

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Commit messages:
 - Backport 092a7343a45297e481f9facb3420b2e91af5699d

Changes: https://git.openjdk.org/jdk21u-dev/pull/2079/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2079&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327753
  Stats: 315 lines in 3 files changed: 71 ins; 244 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2079.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2079/head:pull/2079

PR: https://git.openjdk.org/jdk21u-dev/pull/2079