[prefer-readonly-parameter-types] FR: Add an option to allow `Readonly<>` to satisfy the rule

**Repro**

See #2699 for an example of when this could be useful.

**Rationale**

I see this as a trade-off - turning such an option on would reduce the strictness of the rule (as far as I understand it, `Readonly<>` only guarantees shallow readonlyness, this rule checks for deep readonlyness), however, it would make it much easier to use in certain cases like #2699 or #2079.