It's a tiny module with one trait and a default impl. It's not used in
`rustc_query_system`; all uses and non-default impls are in
`rustc_middle` and `rustc_query_impl`.

This commit moves it into `rustc_middle`, which makes things simpler
overall.

It's a better place for it, because it relates to queries.

They are defined in `rustc_query_system` but used in `rustc_query_impl`.
This is very much *not* how things are supposed to be done; I suspect
someone got lazy and took a shortcut at some point.

This commit moves the errors into `rustc_query_impl`. This requires more
lines of code to give `rustc_query_impl` an errors module, but it's
worthwhile to do things in the normal way instead of a weird exceptional
way.

It's unused. And it's nice to remove this function that didn't behave
like normal `clear` does, as the comment explained.

Extend CI postprocessing to aggregate pass/fail/ignored counts
for debuginfo tests. Tests are identified via their reported
suite names (e.g. debuginfo-gdb, debuginfo-lldb or debuginfo-cdb).

Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>

Some `rustc_query_system` cleanups

Small improvements I found while looking closely at `rustc_query_system`. Best reviewed one commit at a time.

r? @cjgillot

…obzol

citool: report debuginfo test statistics

Extend CI postprocessing to aggregate pass/fail/ignored counts for debuginfo tests. Tests are identified via their reported suite names (e.g. debuginfo-gdb, debuginfo-lldb or debuginfo-cdb).

…alysis, r=jdonszelmann

Convert to inline diagnostics in `rustc_pattern_analysis`

For rust-lang#151366

r? @jdonszelmann

…ze, r=jdonszelmann

Convert to inline diagnostics in `rustc_monomorphize`

For rust-lang#151366

r? @jdonszelmann