[jdk21u-dev] RFR: 8348625: [21u, 17u, 11u] Revert JDK-8185862 to restore old java.awt.headless behavior on Windows

[Christoph Langer]

This basically reverts 78e35ea113bed4a5f66225836c887a45696bbf44 to restore old behavior with regards to headless handling on Windows.

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Commit messages:
 - JDK-8348625

Changes: https://git.openjdk.org/jdk21u-dev/pull/1359/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1359&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348625
  Stats: 138 lines in 6 files changed: 20 ins; 87 del; 31 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1359.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1359/head:pull/1359

PR: https://git.openjdk.org/jdk21u-dev/pull/1359