Disallow const declaration in for loop init part

[mug1wara26]

As per the source 3 docs, the init part of a for loop should be either an expression or a let expression, however the following code snippet runs on source 3 and 4

let b = 2;
for (const a = 4; b < 10; b = b + 1) {
    display(b);
}

A rule should be added that checks for const declaration.