Rollup merge of #131642 - jieyouxu:build-fail-check-fail, r=Kobzol

Special case error message for a `build-fail` test that failed check build

A `build-fail` test requires that a check build (roughly `--emit=metadata`, no codegen) succeeds but fails later. Previously, if its check build failed, the user will see the error message

```
error: test compilation failed although it shouldn't!
```

which is confusing. Because the test is `build-fail`, we want the test compilation to fail! This error message doesn't account for the difference between a check build and a complete build, so let's special case the error message for a `build-fail` test whose check build failed to instead say

```
error: `build-fail` test is required to pass check build, but check build failed
```

Fixes #130894.

0 files changed, 0 insertions, 0 deletions