Add mw.track calls for jquery.migrate

Can't use mw.log.deprecate because many of these are fired
for specific behaviour within a method, not for access to the method
itself.

And mustn't fire the events with topic "mw.deprecate" as we can't satisfy
all the requires properties of that event schema (such as having a search
phrase to find offending code). These tracking hits would be for hit
counts only, not for finding where it comes from (we'll still have wikiid,
pagename, revision id and referral information from EventLogging though).

Change-Id: I6c868f2ce831d74889ed58b6ab4a69b233b3923f