Instead of passing the pre-rendered pillar as an override, do it like
the regular `state` execution module does with `salt-call`: Check if the
pillar needs to be rendered, otherwise reuse the already rendered one.

Also, ensure that __pillar__ in wrapper modules contains the same one
used during rendering, same thing for the one passed to `state.pkg`.

Also, ensure that when pillars are rerendered during a state run, they
get the master opts in addition to the minion ones, since some modules
used in the pillar can rely on them to be present.

Also, ensure pillar overrides are accepted for the same functions as with
the regular `state` execution module.

This also ports saltstack#50489 into the present