WHY
To allow a custom Redis size to be used for 100M quota - this is the GCP equivalent of the logic already introduced for AWS.

WHAT
Check Redis r.Spec.Size and set the memory in the create strategy based on this.

Add check in RHOAM to set the size in the CR based on the platform type

HOW
<Suggestions for how this may be solved. [Optional]

TESTS
<List of related tests>

DONE
<bullet point items for what should be completed>