Associated constants are not resolved on structs from other crates in patterns

[petrochenkov]

Crate 1:

// This must be a `struct` (of any kind), but not `enum` or `type`
pub struct S;

Crate 2:

extern crate crate1;

trait Tr {
    const C: u8;
}

impl Tr for crate1::S {
    const C: u8 = 0;
}

fn main() {
    match 0u8 {
        // This must be a pattern, but not expression
        crate1::S::C => {}, // error: no associated item named `C` found for type `crate1::S` in the current scope
        _ => {},
    }
}

The reason is related to #30361, structs from other crates are defined as DefStruct and local structs are defined as DefTy.
Associated item resolution in patterns somehow works with with DefTy, but not with DefStruct.
I audited the use of both definitions in type checker, but still wasn't able to figure out what exactly happens.