Description of problem:

The operator applies by default the `rollingUpdate` deployment strategy, however, if the administrator or PE operating the platform wants to apply the `Recreate` strategy, it is not possible right now. {}{}

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

 Following the same pattern to patch the Deployment definition of the RHDH instance, to apply the `Recreate` strategy, the following patterns should work:

Option 1:

apiVersion: rhdh.redhat.com/v1alpha4
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        strategy:
          rollingUpdate: null
          type: Recreate                             

Option 2:

apiVersion: rhdh.redhat.com/v1alpha4
kind: Backstage
metadata:
  name: developer-hub
spec:
  deployment:
    patch:
      spec:
        strategy:
          rollingUpdate: null
          rollingUpdate:
            $patch: delete 

Actual results:

The operator does not apply that change successfully and the following errors are displayed in the Backstage status section:

failed to apply backstage objects failed to apply object: Deployment.apps "backstage-developer-hub" is invalid: spec.strategy.rollingUpdate: Forbidden: may not be specified when strategy `type` is 'Recreate' 

Expected results:

Apply the new deployment strategy successfully.

Reproducibility (Always/Intermittent/Only Once):

Always applying that configuration

Build Details:

Additional info (Such as Logs, Screenshots, etc):