Added ec2:DeleteVpcEndpoints action needed to delete serverless Kafka clusters

[atqhg23]

Description

Access to ec2:DeleteVpcEndpoints is needed to be able to delete serverless kafka clusters. The following error came up when the cleanup role did not have access to the action:

There is an issue with your clusters.
Code: InvalidInput.InsufficientPermissionException
Message: Amazon MSK could not create or delete your cluster because you don't have the necessary permissions required for the operation.

Related issue(s) (if applicable)

• Fixes #113

Checklist

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Documentation

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[mlevit]

@atqhg23 thank you very much for investigating this one your side and creating the PR.