Add response header timeouts (#9170)

- Add conservative timeouts upto 3 minutes
  for internode communication
- Add aggressive timeouts of 30 seconds
  for gateway communication

Fixes #9105
Fixes #8732
Fixes #8881
Fixes #8376
Fixes #9028

cmd/gateway/s3/gateway-s3.go

@@ -152,7 +152,7 @@ var defaultAWSCredProviders = []credentials.Provider{
 	&credentials.FileAWSCredentials{},
 	&credentials.IAM{
 		Client: &http.Client{
-			Transport: minio.NewCustomHTTPTransport(),
+			Transport: minio.NewGatewayHTTPTransport(),
 		},
 	},
 	&credentials.EnvMinio{},
@@ -212,7 +212,7 @@ func (g *S3) NewGatewayLayer(creds auth.Credentials) (minio.ObjectLayer, error)
 	metrics := minio.NewMetrics()
 
 	t := &minio.MetricsTransport{
-		Transport: minio.NewCustomHTTPTransport(),
+		Transport: minio.NewGatewayHTTPTransport(),
 		Metrics:   metrics,
 	}