feat: Optionally set db_parameter_group_name for specific rds_cluster_instance

[bruceoutdoors]

Description

Add capability to set db_parameter_group_name for a specific database cluster instance

Motivation and Context

Suppose I want to set a DB that has longer query timeout from other instances in the cluster (e.g. for analytics purposes). I want to create a custom endpoint that only has this DB instance with a different parameter group from the rest. Currently, there is no means of doing this; the db_parameter_group_name sets the same parameter group for all instances.

Breaking Changes

None.

How Has This Been Tested?

• [ ] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [ ] I have tested and validated these changes using one or more of the provided examples/* projects
• [ ] I have executed pre-commit run -a on my pull request

[bryantbiggs]

resolved in #410

[github-actions[bot]]

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