Rollup merge of #147898 - Zalathar:aux-props, r=jieyouxu

compiletest: Move `AuxProps` out of `EarlyProps`

The primary purpose of `EarlyProps` is to discover revisions, so that we can create a separate test structure for each revision.

Revisions can (and do) have different auxiliaries, and up-to-date checking is already done per-revision, so it makes more sense to perform up-to-date checks based on the current revisions's auxiliaries only.

r? jieyouxu

Author: Zalathar