Since we support solaris 11 and macOs Sierra as minimum, we can get rid
of the runtime overhead.

For PGO/coverage tests that don't need to build or run an actual artifact, we
can use `-Zno-profiler-runtime` to run the test even when the profiler runtime
is not available.

The profiler runtime is no longer built in mingw test jobs, so these tests
should naturally be skipped by `//@ needs-profiler-support`.

… candidates

We don't build LLVM when using the precompiled version from the CI builder.

Signed-off-by: onur-ozkan <work@onurozkan.dev>

Always emit `native-static-libs` note, even if it is empty

Fixes rust-lang#108825.

Don't build a broken/untested profiler runtime on mingw targets

Context: https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Why.20build.20a.20broken.2Funtested.20profiler.20runtime.20on.20mingw.3F

rust-lang#75872 added `--enable-profiler` to the `x86_64-mingw` job (to cause some additional tests to run), but had to also add `//@ ignore-windows-gnu` to all of the tests that rely on the profiler runtime actually *working*, because it's broken on that target.

We can achieve a similar outcome by going through all the `//@ needs-profiler-support` tests that don't actually need to produce/run a binary, and making them use `-Zno-profiler-runtime` instead, so that they can run even in configurations that don't have the profiler runtime available. Then we can remove `--enable-profiler` from `x86_64-mingw`, and still get the same amount of testing.

This PR also removes `--enable-profiler` from the mingw dist builds, since it is broken/untested on that target. Those builds have had that flag for a very long time.

change method resolution to constrain hidden types instead of rejecting method candidates

Some of these are in probes and may affect inference. This is therefore a breaking change.

This allows new code to compile on stable:

```rust
trait Trait {}

impl Trait for u32 {}

struct Bar<T>(T);

impl Bar<u32> {
    fn foo(self) {}
}

fn foo(x: bool) -> Bar<impl Sized> {
    if x {
        let x = foo(false);
        x.foo();
        //^ this used to not find the `foo` method, because while we did equate `x`'s type with possible candidates, we didn't allow opaque type inference while doing so
    }
    todo!()
}
```

r? ``@compiler-errors``

fixes  rust-lang#121404

cc rust-lang#116652

Avoid ICES after reporting errors on erroneous patterns

fixes rust-lang#109812
fixes rust-lang#125914
fixes rust-lang#124004

Remove some msys2 utils

`dos2unix` should no longer be necessary. I suspect `diffutils` might not be needed either as (I think) only `diff` is used and that seems to be shipped with git bash at least.

try-job: x86_64-msvc
try-job: x86_64-msvc-ext
try-job: dist-x86_64-msvc

std::unix::fs::link using direct linkat call for Solaris.

Since we support solaris 11 as minimum, we can get rid of the runtime overhead.

try-job: dist-various-2

extend the check for LLVM build

We don't build LLVM when using the precompiled version from the CI builder.

Closes rust-lang#126156