Auto merge of #122997 - matthiaskrgr:compiletest_ices, r=oli-obk

compiletest ice tracking

see https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/where.20to.20mass-add.20known.20ices.20.2F.20merging.20glacier.20into.20rust/near/429082963

This will allow us to sunset most of https://github.com/rust-lang/glacier
The rustc ices will be tracked directly inside the rust testsuite
There are a couple of .sh tests remaining that I have not ported over yet.

This adds `tests/crashes`, a file inside this directory MUST ice, otherwise it is considered test-fail.
This will be used to track ICEs from glacier and the bugtracker.
When someones pr accidentally fixes one of these ICEs, they can move the test from `crashes` into `ui` for example.

I also added a new tidy lint that warns when a test inside `tests/crashes` does not have a `//@ known-bug: ` line

the env var `COMPILETEST_VERBOSE_CRASHES` can be set to get exit code, stderr and stdout of a crash-test to aid debugging/adding tests.

Author: bors

src/bootstrap/src/core/build_steps/test.rs

@@ -1400,6 +1400,8 @@ impl Step for RunMakeSupport {
 
 default_test!(Ui { path: "tests/ui", mode: "ui", suite: "ui" });
 
+default_test!(Crashes { path: "tests/crashes", mode: "crashes", suite: "crashes" });
+
 default_test!(RunPassValgrind {
     path: "tests/run-pass-valgrind",
     mode: "run-pass-valgrind",

src/bootstrap/src/core/builder.rs

@@ -745,6 +745,7 @@ impl<'a> Builder<'a> {
                 test::ExpandYamlAnchors,
                 test::Tidy,
                 test::Ui,
+                test::Crashes,
                 test::RunPassValgrind,
                 test::Coverage,
                 test::CoverageMap,