Identify and standardize all instances of database denormalization

[jeremystretch]

Proposed Changes

A new set of utilities was introduced under #9102 to better facilitate the caching of statistical data based on foreign key relationships. Currently, these are employed only for some fields on the CableTermination model, but they can be readily used elsewhere. This issue seeks to track the identification of such uses for the purposes of standardizing how we denormalize in NetBox.

Current and future instances of denormalization are tracked below:

• circuits.Circuit: termination_a, termination_b
• dcim.Interface: wireless_link
• Cache the number of each component type assigned to devices/VMs #6347
• Automatically create direct assignments of IP addresses to their parent prefixes #7845
• Cache the number of members assigned on each virtual chassis #10197

Justification

Moving to a standardized denormalization implementation will ease long-term maintenance and reduce the likelihood of introducing new bugs.