Clock tree refactor: introduce instance type (#5129)

* Access properties by name

* Replace clock node classification with an instance type

* Pull is_definition up into instance

* Pass instance type to request/release functions

* Replace unnecessary use of dyn note type

* Allow the instance to force generate config type and methods

* Pass instance to config_apply_impl_function

* Move function out of trait

* Move node_functions

* Move more functions

* Remove PeripheralClockSource

* Rename argument

* Expand divider validation

* Add some todos

* Remove CTNT trait implementation from ClockTreeNodeInstance

* Use indexmap to avoid quadratic lookup

* Fix typos, use constant case for names

* Extract box wrapper function

* Remove config_docline

* Remove unnecessary node_frequency_impl2

Author: bugadani