More manual conversion of index based for loops to for-of loops

#60407

Prevents console.log in gulp files from being interpreted as tasks. Fixes #11699

fixes #60895

Replaces many loops of the form:

```js
for (let i = 0; i < elements.length; ++i) {
    const i = elements[i];
   ...
}
```

with:

```js
for (const element of elements) {
    ...
}
```

Mix of a horrible regex based find/replace and manual touch ups

Casts can hide some type errors

See https://github.com/Microsoft/TypeScript-TmLanguage/issues/691

Assuming that properties named `label` or `name` are dom properties is incorrect and causes a lot of false positives. This results in weirdly inconsistent colorization

Fixes #65513

Fixes #65504

Fixes #65921
Fixes #65051

Fixes #64900