Add support for presigning sts:GetCallerIdentity

[skmcgrail]

Add support for presigning sts:GetCallerIdentity.

Fix: #1021

Validated with the following code:

package main

import (
	"context"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"

	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/service/sts"
)

func main() {
	cfg, err := config.LoadDefaultConfig(context.Background())
	if err != nil {
		panic(err)
	}

	presignClient := sts.NewPresignClient(sts.NewFromConfig(cfg))

	getCallerIdentity, err := presignClient.PresignGetCallerIdentity(context.Background(), &sts.GetCallerIdentityInput{})
	if err != nil {
		panic(err)
	}

	req := &http.Request{
		Method: getCallerIdentity.Method,
		URL: func() *url.URL {
			parse, err := url.Parse(getCallerIdentity.URL)
			if err != nil {
				panic(err)
			}
			return parse
		}(),
		Header: getCallerIdentity.SignedHeader,
	}

	response, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}

	body, err := ioutil.ReadAll(response.Body)
	if err != nil {
		panic(err)
	}

	fmt.Printf("%s\n", body)
}

[jasdel]

Looks like compile issue with service/s3. Also looks like the eachmodule tool has issue and doesn't correct output stdout or stderr in case of a failure correctly.

[skmcgrail]

Looks like compile issue with service/s3. Also looks like the eachmodule tool has issue and doesn't correct output stdout or stderr in case of a failure correctly.

Fixed didn't notice the S3 presign test cases beforehand.