* Fix unarchive with strip-components in extra_opts (#37048)
* Fix unarchive with strip-components in extra_opts
When unarchive is given extra_opts to strip all leading directories, it
could end up trying to change the permissions on the root directory.
Tar archives shouldn't contain absolute paths anyways so make sure that
all paths are relative as we handle them.
Fixes#21397
(cherry picked from commit cca0ccaf97)
