[jdk21u-dev] RFR: 8328380: Remove applet usage from JColorChooser tests Test6348456

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

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Commit messages:
 - Backport 78d1b9046830198cd61c505f04f245a430878a5b

Changes: https://git.openjdk.org/jdk21u-dev/pull/1233/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1233&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328380
  Stats: 93 lines in 2 files changed: 37 ins; 45 del; 11 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1233.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1233/head:pull/1233

PR: https://git.openjdk.org/jdk21u-dev/pull/1233