Consider using `errors.As` instead of type assertions in `segment.Close` to support wrapped errors

[okonos]

Segment.Close enriches the segment with details specific to the error passed, but since it uses type assertions, the error must be of an exact type:

aws-xray-sdk-go/strategy/exception/default_exception_formatting_strategy.go

Lines 118 to 123 in 0532644

	if reqErr, ok := err.(awserr.RequestFailure); ok {
	// A service error occurs
	if reqErr.RequestID() != "" {
	isRemote = true
	}
	}

aws-xray-sdk-go/strategy/exception/default_exception_formatting_strategy.go

Lines 136 to 138 in 0532644

	if err, ok := err.(*XRayError); ok {
	e.Type = err.Type
	}

aws-xray-sdk-go/strategy/exception/default_exception_formatting_strategy.go

Lines 143 to 145 in 0532644

	if err, ok := err.(StackTracer); ok {
	s = err.StackTrace()
	}

Using errors.As there instead of type assertions would make it work with wrapped errors as well.