[jdk20u] RFR: 8303186: Missing Classpath exception from Continuation.c

[Tyler Steele]

Hi all,

This pull request contains a backport of commit [dc08216f](https://github.com/openjdk/jdk/commit/dc08216f0ef55970c96df43bcc86ebd5792d486e) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Tyler Steele on 2 Mar 2023 and was reviewed by David Holmes and Jaikiran Pai.

I recognize that we are in the RC stage of jdk20 release. I'd like to include this change in the first release of jdk20, as it probably should have happened in jdk19. It isn't a code change, so the risk is quite low. 

Thanks!

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Commit messages:
 - Backport dc08216f0ef55970c96df43bcc86ebd5792d486e

Changes: https://git.openjdk.org/jdk20u/pull/13/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=13&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303186
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk20u/pull/13.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u pull/13/head:pull/13

PR: https://git.openjdk.org/jdk20u/pull/13