[jdk21u-dev] RFR: 8328368: Convert java/awt/image/multiresolution/MultiDisplayTest/MultiDisplayTest.java applet test to main

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

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Commit messages:
 - Backport ba05c6d0b6955a0c5110b75e709e2206961f9fec

Changes: https://git.openjdk.org/jdk21u-dev/pull/1307/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1307&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328368
  Stats: 376 lines in 3 files changed: 169 ins; 207 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1307.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1307/head:pull/1307

PR: https://git.openjdk.org/jdk21u-dev/pull/1307