[lworld] RFR: 8372038: [lworld] Update ExplodedImage to use preview mode correctly [v3]

[Roger Riggs]

On Wed, 26 Nov 2025 16:01:18 GMT, David Beaumont <duke at openjdk.org> wrote:

>> Adds preview mode support for ExplodedImage.
>> 
>> Adds tests so both ExplodedImage and ImageReader implementations of SystemImage are tested with exactly the same test data and assertions.
>
> David Beaumont has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:
> 
>  - Merge branch 'lworld' into jdk_8372038_exploded/squashed
>  - fixing duplicate elements
>  - end-of-file newline
>  - comment fix
>  - Tweaking tests to explain jtreg issue
>  - delete old tests
>  - tests unified in SystemImage, all passing
>  - Exploded image parity of testing

Ok

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Marked as reviewed by rriggs (Committer).

PR Review: https://git.openjdk.org/valhalla/pull/1743#pullrequestreview-3511662629