RFR: 8350964: Add an ArtifactResolver.fetch(clazz) method [v2]

[Mikhail Yankelevich]

On Tue, 11 Mar 2025 16:53:17 GMT, Matthew Donovan <mdonovan at openjdk.org> wrote:

>> In this PR, I created a new method, `ArtifactResolver.fetchOne()`, to consolidate duplicate code across tests.
>
> Matthew Donovan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Changed exception message in Artifact resolver and fixed logic in keytool test

LGTM

-------------

PR Comment: https://git.openjdk.org/jdk/pull/23989#issuecomment-2717421676