wfSuppressWarnings() and wfRestoreWarnings() were split out into a
separate library. All usages in core were replaced with the new
functions, and the wf* global functions are marked as deprecated.
Additionally, some uses of @ were replaced due to composer's autoloader
being loaded even earlier.
Ie1234f8c12693408de9b94bf6f84480a90bd4f8e adds the library to
mediawiki/vendor.
Bug: T100923
Change-Id: I5c35079a0a656180852be0ae6b1262d40f6534c4
* This backend passes all filebackend and parser tests
* Fixed setupUploads() in parser tests to just use create() instead
of using store() and having a race condition in the process
* Fixed 'use-filebackend=' for Parser tests
bug: 58094
Change-Id: Ib0c38183cb7f9f2325da98c8a8a1eb2b8e39a7aa
