[PFR] Onboard APIGW as a source

[Jonathan Rau]

Story
As a user of SyntheticSun, I want to have API Gateway Access Logs onboarded so that I can use the enrichment, analysis and anomaly detection of the solution for my APIs

Definition of Done

• ES Index added to gewalthaufen.py
• Add a HTTP APIGWv2 deployment to Stage 3 CFN
• Add new resources:
  • Lambda function to return values
  • Lambda function to parse logs
  • CloudWatch logs group for Access Logs
  • Lambda permission for APIGW to invoke the function
  • Lambda permissions & Log subscription for Access Logs
• Add ZIP lambda function to Stage-1/Artifacts
• Update both Stage 3 Architecture diagrams & readme steps
• Create helper script to add Access Logs in the correct format
• Integrate with WAF IP Insights

Nice to Have
N/A

Additional Information

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-apigatewayv2-api.html#aws-resource-apigatewayv2-api--examples
• https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/apigatewayv2.html#ApiGatewayV2.Client.update_stage
• https://bl.ocks.org/magnetikonline/c314952045eee8e8375b82bc7ec68e88

[Jonathan Rau]

Need to develop access log helper script and update readme steps for Stage 3

[Jonathan Rau]

Added wrong PR lol