Add preparation flag related to sub id to name map

[lindsayad]

And make sure we do sync the map when we're completing preparation

[moosebuild]

Job Coverage, step Generate coverage on 2be9790 wanted to post the following:

Coverage

	142ae1	#4485 2be979
	Total	Total	+/-	New
Rate	65.61%	65.61%	+0.00%	100.00%
Hits	78653	78665	+12	17
Misses	41232	41231	-1	0

Diff coverage report

Full coverage report

This comment will be updated on new commits.

[roystgnr]

At first glance it looks like we just need to fix up downstream use cases before we can rebase this and retry CI ...

But at second glance, it looks like at least some of those failures downstream are because we're e.g. asserting _mesh->is_prepared() where we should only be asserting _mesh->_preparation.has_boundary_id_sets? We might be able to fix that here; I could push a commit to try, if my comment here isn't clear enough.

[roystgnr]

Huh. Now I'm seeing is_prepared() assertions failing in DofMap, and I don't actually want to weaken those. We really shouldn't be getting to DoF numbering or renumbering without a prepare_for_use() (or ideally complete_preparation()) first, and I'm not sure how we are.

[lindsayad]

Those failures will be fixed by idaholab/moose#33276, so we can wait for that to make it to MOOSE master and then invalidate here