[jdk23u] RFR: 8340210: Add positionTestUI() to PassFailJFrame.Builder

[Alexey Ivanov]

Backporting [JDK-8340210](https://bugs.openjdk.org/browse/JDK-8340210) to 23u.

> This pull request contains a backport of commit [f0ae90f3](https://github.com/openjdk/jdk/commit/f0ae90f30c346544e87217ef1832d6a350fe1985) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
>
> The commit being backported was authored by Harshitha Onkar on 17 Sep 2024 and was reviewed by Alexey Ivanov and Alexander Zvegintsev.

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Commit messages:
 - Backport f0ae90f30c346544e87217ef1832d6a350fe1985

Changes: https://git.openjdk.org/jdk23u/pull/106/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=106&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340210
  Stats: 23 lines in 1 file changed: 23 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk23u/pull/106.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/106/head:pull/106

PR: https://git.openjdk.org/jdk23u/pull/106