resourceloader: Move per-page function calls to startup.js

resourceloader: Move per-page function calls to startup.js

Turn these embedded function calls into variable declarations,
later consumed by startup.js.

This has a few benefits:

* Variables can be declared immediately, without needing to
  defer it to after mw.loader arrives from startup, via an RLQ
  callback. This makes the inline script simpler and a tiny
  bit smaller.

* By moving the actual function calls to startup.js, they could
  easily be re-arranged in the future or migrated in other ways
  without needing to worry about HTML caching and keeping concurrent
  compatibility with both orders of execution.

Change-Id: I1c995a9572d9eb3201a565341c19bdf81ab00eff