Media: remove any `attachment-filter` query param when switching views.

Fix an issue where the media attachment filter no longer worked after switching to list view, filtering by a media type then switching back to the grid view.

Props itzmekhokan, netsurfer2705, zodiac1978.
Fixes #43656.


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git-svn-id: https://core.svn.wordpress.org/trunk@47689 1a063a9b-81f0-0310-95a4-ce76da25c4cd