Add API_GW_ACCESS_LOGGING_ENABLED rule

[bmorrissirromb]

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Rule Name:
    API_GW_ACCESS_LOGGING_ENABLED
Description:
  Checks that methods in an Amazon API Gateway stage for deployed APIs have 'loggingLevel' as one of the values specified in the rule parameter 'loggingLevel'. The rule returns NON_COMPLIANT if any method in a stage has 'loggingLevel' set to a value not matching any of the logging levels specified in the rule parameter.
Trigger:
  Configuration Change on AWS::ApiGateway::Stage or AWS::ApiGatewayV2::Stage
Reports on:
  AWS::ApiGateway::Stage or AWS::ApiGatewayV2::Stage
Rule Parameters:
  None
Scenarios:
  Scenario: 1
    Given: In the Stage configuration item, 'AccessLogSetting' (APIGWv1) or 'AccessLogSettings' (APIGWv2) is defined.
     Then: Return COMPLIANT
  Scenario: 2
    Given: In the Stage configuration item, neither 'AccessLogSetting' (APIGWv1) nor 'AccessLogSettings' (APIGWv2) are defined.
     Then: Return NON_COMPLIANT