Clean up globals exemptions within .eslintrc

What does this MR do?

Removes unnecessarily-exempted globals from .eslintrc where possible.

Are there points in the code the reviewer needs to double check?

npm run eslint should return 0 errors.

Why was this MR needed?

see Issue #24756 (closed)

Does this MR meet the acceptance criteria?

• Tests
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #24756 (closed)