Serverless doesn't need and shouldn't create a Parameter Group #271
Description
Describe the Bug
Serverless ElastiCache doesn't need and shouldn't create a Parameter Group
https://repost.aws/knowledge-center/elasticache-assign-parameter-group
This module currently by default ALWAYS creates a Parameter Group.
I have to explicitly set create_parameter_group = false. This should be handled by the module, if I am using serverless_enabled = true, then it should not create the parameter group by default.
Expected Behavior
See above
Steps to Reproduce
See above
Screenshots
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Environment
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Additional Context
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