CRDs `categories` are inconsistent

[pmalek]

Problem statement

As pointed out by @mlavacca in #441 (comment) there are some inconsistencies in categories assigned to our CRDs.

... gateway-operator CRDs belong to kong and all, konnect CRDs to kong only, while some configuration CRDs belong to kong-controller and kong, and others configuration CRDs belong tokong only.

This task tracks the work on making these consistent and predictable for end users.

Acceptance criteria

• Ensure that the category change is not affecting already created resources