[jdk17u-dev] RFR: 8328244: Convert javax/swing/JSlider/6742358/bug6742358.java applet test to main

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Commit messages:
 - Backport 5f2a92d954ce485d372c3cb3e5118556b1d076c3

Changes: https://git.openjdk.org/jdk17u-dev/pull/3804/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3804&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328244
  Stats: 227 lines in 3 files changed: 106 ins; 121 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3804.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3804/head:pull/3804

PR: https://git.openjdk.org/jdk17u-dev/pull/3804