[jdk25u] RFR: 8359423: Improve error message in case of missing jsa shared archive

[Matthias Baesken]

Backport of 8359423

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Commit messages:
 - Backport ef291d2d5d5c6ef9767a218b0f8401a0fb911bb2

Changes: https://git.openjdk.org/jdk25u/pull/226/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=226&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8359423
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk25u/pull/226.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/226/head:pull/226

PR: https://git.openjdk.org/jdk25u/pull/226