Fix mw.util dependencies

ext.visualEditor.base doesn't and shouldn't depend on mw.util,
but some other modules do. viewPageTarget.init has a dependency
on mw.util meaning that if VE is loaded through it, we'll always
be fine, but for correctness (and support for other targets),
explicitly indicate the dependency on mw.util for every module that
uses it.

Change-Id: I63821938d899897088799bde4d46b04cd2f9a3e2
Merge "Fix mw.util dependencies"