nrlambda: Add support for LambdaFunctionURLRequest

[rittneje]

Summary

Add support for treating LambdaFunctionURLRequest as a web request.

Desired Behaviour

Currently, this library will treat APIGatewayProxyRequest and ALBTargetGroupRequest as a web request.

go-agent/v3/integrations/nrlambda/events.go

Lines 52 to 64 in ac0e154

	switch r := event.(type) {
	case events.APIGatewayProxyRequest:
	request.Method = r.HTTPMethod
	path = r.Path
	headers = r.Headers
	case events.ALBTargetGroupRequest:
	// https://docs.aws.amazon.com/elasticloadbalancing/latest/application/lambda-functions.html#receive-event-from-load-balancer
	request.Method = r.HTTPMethod
	path = r.Path
	headers = r.Headers
	default:
	return nil
	}

go-agent/v3/integrations/nrlambda/events.go

Lines 97 to 106 in ac0e154

	switch r := event.(type) {
	case events.APIGatewayProxyResponse:
	code = r.StatusCode
	headers = r.Headers
	case events.ALBTargetGroupResponse:
	code = r.StatusCode
	headers = r.Headers
	default:
	return nil
	}

Please also add support for LambdaFunctionURLRequest and LambdaFunctionURLResponse.

Possible Solution

Amend the aforementioned switch cases.

Additional context

We want to be able to use Lambda function URLs instead of API Gateway.

[Newrelic-Boomi]

https://new-relic.atlassian.net/browse/NR-416783