Filesystem API: Don't immediately return an error for invalid file names...

Filesystem API: Don't immediately return an error for invalid file names contained within a Zip while it's being extracted.

This allows the extraction of the rest of the valid files within the archive to continue.

See #42016

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git-svn-id: https://core.svn.wordpress.org/trunk@41844 1a063a9b-81f0-0310-95a4-ce76da25c4cd