Rollup merge of #126045 - olafes:master, r=compiler-errors

check_expr_struct_fields: taint context with errors if struct definit…

Taint errors while checking `struct { field: 1 }` below if struct definition has duplicated fields so that we don't pass it to const eval.

fixes #125842, fixes #124464, fixes #124552
```rust
struct Struct {
    field: Option<u8>,
    field: u8,
}

static STATIC: Struct = Struct {
    field: 1,
};

pub fn main() {}
```
(This was #125947 but i messed something up, sorry)
r? ``@compiler-errors``

Author: matthiaskrgr