[Bug]: Temp variable for new dynamic array has wrong type

[kevinclancy]

Describe the issue:

When we print slithir for the following source file:

contract Test {
    function test() external {
        int[] memory a = new int[](5);
    }
}

the temp variable in the generated IR has the wrong type. It's an array of arrays instead of a 1-dimensional array:

INFO:Printers:Contract Test
        Function Test.test() (*)
                Expression: a = new int256[](5)
                IRs:
                        TMP_1int256[][])  = new int256[](5)
                        a(int256[]) := TMP_1(int256[][])

Code example to reproduce the issue:

contract Test {
    function test() external {
        int[] memory a = new int[](5);
    }
}

Version:

0.9.5

Relevant log output:

INFO:Printers:Contract Test
        Function Test.test() (*)
                Expression: a = new int256[](5)
                IRs:
                        TMP_1int256[][])  = new int256[](5)
                        a(int256[]) := TMP_1(int256[][])

[0xalpharush]

The linked PR doesn't handle late type conversion for literals in the case of an EventCall, NewStructure, or NewContract.

contract New {
    constructor(int x) {
    }
    function b(int a) external {

    }
}
contract Test {
    struct X {
        int x;
    }
    event Log(int message);
    function test() external {
        emit Log(5);
        New n = new New(5);
        n.b(5);
        X(5);
        
    }
}

[0xalpharush]

similar to make the contract available in NewContract we need to that for EventCall and make Event readily available #2370

slither/slither/slithir/convert.py

Line 1920 in 13d7d9f

# TODO: implement instances lookup for events, NewContract