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

### 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:

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

Reproduce the issue with the provided Test contract and inspect the generated SlithIR and printer output. Trace how the temporary variable type is produced for the dynamic array allocation; done means the temporary is typed as a one-dimensional int256[] and matches the assignment to a.

Written by the indexing model from the issue text.