[E0308] array misamatch types

[MahadMuhammad]

Array mismatch types - E0308

• This error code was already added in this PR [E0308] mismatch types on both sides of assignment Operator #2494. But this error code is also valid for this mismatch array case.

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Code tested:

// { dg-additional-options "-w" }
fn main() {
    let array: [i32; 5] = [1, 2, 3];
    // { dg-error "mismatched types, expected an array with a fixed size of 5 elements, found one with 3 elements" "" { target *-*-* } .-1 }
}

Output:

➜  gccrs-build gcc/crab1 /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/arrays2.rs
/home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/arrays2.rs:3:27: error: mismatched types, expected an array with a fixed size of 5 elements, found one with 3 elements [E0308]
    3 |     let array: [i32; 5] = [1, 2, 3];
      |                           ^

Analyzing compilation unit

Time variable                                   usr           sys          wall           GGC
 phase parsing                      :   0.00 (  0%)   0.00 (  0%)   0.01 (100%)    33k ( 18%)
 parser (global)                    :   0.00 (  0%)   0.00 (  0%)   0.01 (100%)    33k ( 18%)
 TOTAL                              :   0.00          0.00          0.01          179k
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.

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gcc/rust/ChangeLog:

* backend/rust-compile.cc (HIRCompileBase::verify_array_capacities): Added ErrorCode.

gcc/testsuite/ChangeLog:

* rust/compile/arrays2.rs: