Remove the WithPriority() deprecated method

[luispfgarces]

Is your request related to a problem you have?

Remove the WithPriority(...) method which has been deprecated for quite some time now, and we think it is safe to remove it.

Describe the solution you'd like

Removal of the method. Its functionality has been replaced by the RuleAddPriorityOption on RulesEngine.AddRuleAsync(...).

Are you able to help bring it to life and contribute with a Pull Request?

Yes

Additional context

No response