[jdk21u-dev] RFR: 8328115: Convert java/awt/font/TextLayout/TestJustification.html applet test to main

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport 0204aacb0305e94a7d6d5299a5ae835f3f71b030

Changes: https://git.openjdk.org/jdk21u-dev/pull/724/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=724&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328115
  Stats: 359 lines in 3 files changed: 114 ins; 154 del; 91 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/724.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/724/head:pull/724

PR: https://git.openjdk.org/jdk21u-dev/pull/724