Add cloud integration support

[Ricky-Thomas]

Adding support for the following endpoints:

AWS

• GET (list)
• GET (list available namespaces)
• POST (create account config)
• DELETE (delete account config)
• PUT (generate external ID)
• PUT (update account)

AWS LOGS

• GET (list AWS logs integrations)
• POST (add aws log lambda ARN)
• DELETE (delete lambda ARN config)
• POST (aws integration logs check lambda async) - check if lambda_arn exists within account
• GET (list log services)
• POST (AWS Integration Logs check Services Async)
• POST (save services - this is what needs to run after the previous one to save the services they want for the recently added ARN)

AZURE ENDPOINTS

• GET (list all azure integrations)
• POST (create an azure integration)
• DELETE (delete an azure integration)
• POST (update host filters)
• PUT (update account)

GCP ENDPOINTS

• GET list
• POST create
• DELETE delete
• PUT (set GCP integration automute.) This also updates host filters. And is truly the only use case for updating a config here. It will allow you to update other fields as well, but not project_id and client_email which are the required fields. If those fields are to be updated an entirely new config should be created. We need to update the docs to reflect this info.

[nmuesch]

Closing this as its been superseded by #201