[jdk21u-dev] RFR: 8328403: Remove applet usage from JColorChooser tests Test6977726

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

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Commit messages:
 - Backport 1e76e1fdfa67c28ce20b0dc7fb0253670be54554

Changes: https://git.openjdk.org/jdk21u-dev/pull/1237/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1237&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328403
  Stats: 63 lines in 2 files changed: 21 ins; 32 del; 10 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1237.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1237/head:pull/1237

PR: https://git.openjdk.org/jdk21u-dev/pull/1237