ConstraintTemplate have no maximum name length

[maxsmythe]

Constraint templates do not currently have a maximum name length.

It is necessary to cap the maximum possible constraint template name length to leave room for ConstraintTemplateStatus resources. Constraints have a maximum name length of 63 chars, we can be a bit more generous with Templates, if necessary.

Here is the PR that caps constraint name length, for reference:

https://github.com/open-policy-agent/frameworks/commit/b745ff7e8a941ade965188826050a98b62f151a2#diff-f0ceecee7c4c5529a7457604249a3c7e04bf92c547d1b42bf9af2e710cc4ea07

[willbeason]

Would we do this in the ConstraintTemplate CRD, or programmatically in client.AddTemplate? As-is we'd have to modify the generated YAML ConstraintTemplate CRD output for it to be in the CRD. Programmatically this would be simple to do.

How much do ConstraintTemplateStatus resources need to add to the name? If at most 63 characters, then ConstraintTemplateNames can be up to 253-63=190 characters long.

[maxsmythe]

Probably both? Putting it in the CRD would be most reliable for the K8s API server (not reliant on validation webhook being up), but we'd want it in our code for things like gator test