NewRelic AWS SDK V2 Integration Incompatibility

Reported in GitHub Issue #288.

To Reproduce:

1. Use Go 1.16 (it should also happen with other Go versions)
2. Clone this repo
3. Run go get github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2
4. See this error:

   # github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2
   ../../go/pkg/mod/github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2@v1.0.0/nrawssdk.go:12:24: undefined: aws.Request
   ../../go/pkg/mod/github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2@v1.0.0/nrawssdk.go:23:22: undefined: aws.Request
   ../../go/pkg/mod/github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2@v1.0.0/nrawssdk.go:76:35: undefined: aws.Handlers
   ../../go/pkg/mod/github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2@v1.0.0/nrawssdk.go:77:30: undefined: aws.NamedHandler
   ../../go/pkg/mod/github.com/newrelic/go-agent/v3/integrations/nrawssdk-v2@v1.0.0/nrawssdk.go:81:29: undefined: aws.NamedHandler
   

Why is this happening?

It looks like the current version of v3/integrations/nrawssdk-v2 depends on a prerelease version of github.com/aws/aws-sdk-go-v2. There was a breaking API change to get to github.com/aws/aws-sdk-go-v2@v1.0.0. Thus, v3/integrations/nrawssdk-v2 cannot be used by any projects that use a v1.0.0+ release of the AWS V2 SDK.