* provider/aws: Re-implement api gateway parameter handling
this PR cleans up some left overs from PR #4295, namely the parameter handling.
now that GH-2143 is finally closed this PR does away with the ugly
`request_parameters_in_json` and `response_parameters_in_json` hack.
* Add deprecation message and conflictsWith settings
following @radeksimko s advice, keeping the old code around with a deprecation
warning.
this should be cleaned up in a few releases
* provider/aws: fix missing append operation
* provider/aws: mark old parameters clearly as deprecated
* provider/aws work around #8104
following @radeksimko s lead
* provider/aws fix cnp error
* update docs on required parameter for api_gateway_integration
This parameter was required for lambda integration.
Otherwise,
` Error creating API Gateway Integration: BadRequestException: Enumeration value for HttpMethod must be non-empty`
* documentation: Including the AWS type on the api_gateway_integration docs