Rollup merge of #134876 - Zalathar:bootstrap-test-macros, r=jieyouxu

bootstrap: Consolidate the macros for declaring compiletest test suites

Instead of using a dizzying assortment of different macros to declare these test suite steps, we can mostly just use one `test!` macro with a few optional named arguments.

I'm pretty sure that this doesn't change any behaviour, but please do double-check each of the individual declarations.