decompress() Zend/Filter/Compress/Zip fix

decompress didn't work when a valid parameter was given. It relied on archive that was stored in class.
This fixes it.
testDecompressWhenNoArchieveSetInClass() added
spaces instead of tabs
removed trailing spaces
another trailing space
Adding `@group` and `@covers` annotations to zip decompress test for #6026
Merge branch 'hotfix/#6026-compress-filter-archive-path-fixes'

Close #6026