JDG-5682 allows users to control how the Cache CR controller handles updates to the spec.template field.

Users can now specify the following in their Cache CR(s):

spec: 
  updates: 
    strategy: recreate | retain

The strategies behave as follows:

"retain" (Default): The cache configuration on the server is updated at runtime if possible, otherwise Cache CR status Ready=False.
"recreate": The cache configuration on the server is updated at runtime if possible, otherwise it's deleted and a new cache created with the latest spec.template value.

The "retain" strategy is the behaviour implemented by previous Operator versions and remains the default behaviour if the user does not explicitly define a strategy.