RDS deletion protection

[0xjjoyy]

Use Case - Is your feature request related to a problem? Please describe.
Protect rds resources from being deleted
[RDS.8] RDS DB instances should have deletion protection enabled

Expected Outcome - Describe the solution you'd like
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Describe alternatives you've considered
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Affected AWS resource
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Impact
High: The issue makes a service level improvement which affects all users of AWS
Medium: Single feature which affects a single functionality which is optionally enabled in the AWS service
Low: Niche use case which is particularly affecting the AWS resources if it is configured in a certain way

Supported material
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I can contribute: Yes/No
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Additional context
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Pull Request number
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