RFR: 8353504: CDS archives are not found when JVM is in non-variant location

[Calvin Cheung]

This is to revert part of the change for [JDK-8348028](https://bugs.openjdk.org/browse/JDK-8348028) so that CDS archives can be found in the case that JVM is in a non-variant location.
Also added a test case for this scenario.

Sanity tested tiers 1 and 2.

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Commit messages:
 - 8353504: CDS archives are not found when JVM is in non-variant location

Changes: https://git.openjdk.org/jdk/pull/25361/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25361&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353504
  Stats: 99 lines in 3 files changed: 94 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/25361.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25361/head:pull/25361

PR: https://git.openjdk.org/jdk/pull/25361