Unify `catch-error-name` variable renaming strategy with `prevent-abbreviations` #257

When generating a unique variable name catch-error-name uses number suffixes like error2, error3 etc. It should instead add underscores like error_, error__ etc. and use avoidCapture utility function to do it.

From this comment https://github.com/sindresorhus/eslint-plugin-unicorn/pull/237#issuecomment-464188799