feat(registry) EE-806 add support for AWS ECR (#6165)

* feat(ecr) EE-806 add support for aws ecr

* feat(ecr) EE-806 fix wrong doc for Ecr Region

Co-authored-by: Simon Meng <simon.meng@portainer.io>

api/aws/ecr/ecr.go

@@ -0,0 +1,32 @@
+package ecr
+
+import (
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/credentials"
+	"github.com/aws/aws-sdk-go-v2/service/ecr"
+)
+
+type (
+	Service struct {
+		accessKey string
+		secretKey string
+		region    string
+		client    *ecr.Client
+	}
+)
+
+func NewService(accessKey, secretKey, region string) *Service {
+	options := ecr.Options{
+		Region:      region,
+		Credentials: aws.NewCredentialsCache(credentials.NewStaticCredentialsProvider(accessKey, secretKey, "")),
+	}
+
+	client := ecr.New(options)
+
+	return &Service{
+		accessKey: accessKey,
+		secretKey: secretKey,
+		region:    region,
+		client:    client,
+	}
+}