Add array cast to pointer

[edg-l]

Also fixes some GEPs that were not entirely correct, it now uses the gep using the array type and not the array element type.

mod Main {
    pub extern fn puts(data: *mut char) -> i32;

    pub fn main() -> i32 {
        let x: [char; 13] = ['h','e','l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!', '\0'];
        let z: *mut char = x as *mut char;
        puts(z);
        return 0;
    }
}

[github-actions]

Benchmarking factorial

Compiling factorial (factorial.con)
Finished release in 29.313253ms
Running 5000000 iterations
Using input value: 20
Concrete Result = 2432902008176640000 Time taken : 59.25 ms
Rust Result = 2432902008176640000 Time taken : 60.13 ms

Benchmarking fib

Compiling fib (fib.con)
Finished release in 26.030158ms
Running 5000 iterations
Using input value: 20
Concrete Result = 6765 Time taken : 137.29 ms
Rust Result = 6765 Time taken : 85.25 ms

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 79.03226% with 26 lines in your changes are missing coverage. Please review.

Project coverage is 61.97%. Comparing base (56a8221) to head (a849920).
Report is 6 commits behind head on main.

Files	Patch %	Lines
crates/concrete_codegen_mlir/src/codegen.rs	78.99%	25 Missing ⚠️
crates/concrete_ir/src/lib.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
+ Coverage   61.71%   61.97%   +0.25%     
==========================================
  Files          25       25              
  Lines        4532     4610      +78     
==========================================
+ Hits         2797     2857      +60     
- Misses       1735     1753      +18     

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