RFR: 8288989: Make tests not depend on the source code

[Adam Sotona]

On Wed, 13 Dec 2023 16:54:33 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> > just curious: in what conditions the tests will be executed in a source-less test environment? and in any case isn't it preferable to let the test fail so that the user knows that it failed?
> 
> Some external users execute tests in a context where the source directory is not available. Throwing `jtreg.SkippedException` is a mild form of noticeable failure.

I don't have an access to any environment to test it, so I prefer the same solution as already applied in several similar situations across the JDK tests.

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PR Comment: https://git.openjdk.org/jdk/pull/16470#issuecomment-1855694559