[jdk21u-dev] RFR: 8327972: Convert java/awt/FileDialog/SaveFileNameOverrideTest/SaveFileNameOverrideTest.html applet test to main

[Goetz Lindenmaier]

I backport this for parity with 21.0.9-oracle

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Commit messages:
 - Backport 7283c8b075aa289dbb9cb80f6937b3349c8d4769

Changes: https://git.openjdk.org/jdk21u-dev/pull/2004/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2004&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327972
  Stats: 225 lines in 3 files changed: 91 ins; 134 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2004.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2004/head:pull/2004

PR: https://git.openjdk.org/jdk21u-dev/pull/2004