Phillip Webb f31ffbf927 Don't duplicate META-INF entries in nested directory jars
Update `ZipContent` so that `META-INF` entries are no longer duplicated
in nested jars created from directory entries. This aligns with the
behavior of the classic loader and prevents the same META-INF file from
being discovered twice.

Fixes gh-38862
2023-12-20 17:36:06 -08:00
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