RFR: 8355179: Reinstate javax/swing/JScrollBar/4865918/bug4865918.java headful and macos run

[Prasanta Sadhukhan]

Now that CI linux system is transitioned, the [JDK-8346828](https://bugs.openjdk.org/browse/JDK-8346828) changes is reverted and test is made headful and run on all platforms including macos.
CI testing is ok now..

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Commit messages:
 - 8355179: Reinstate javax/swing/JScrollBar/4865918/bug4865918.java headful and macos run

Changes: https://git.openjdk.org/jdk/pull/24774/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24774&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355179
  Stats: 34 lines in 1 file changed: 18 ins; 3 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/24774.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24774/head:pull/24774

PR: https://git.openjdk.org/jdk/pull/24774