[23.0 backport] d/graphdriver/copy: support src fs w/o xattr support #45465
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Treat copying extended attributes from a source filesystem which does not support extended attributes as a no-op, same as if the file did not possess the extended attribute. Only fail copying extended attributes if the source file has the attribute and the destination filesystem does not support xattrs.
(cherry picked from commit 2b6761f)
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