rest client: Expect context timeouts for locks (#10782)

Add option for rest clients to not mark a remote offline for context timeouts.

This can be used if context timeouts are expected on the call.

pkg/net/url.go

@@ -141,14 +141,18 @@ func ParseURL(s string) (u *URL, err error) {
 }
 
 // IsNetworkOrHostDown - if there was a network error or if the host is down.
-func IsNetworkOrHostDown(err error) bool {
+// expectTimeouts indicates that context timeouts are expected and does not
+// indicate a downed host. Other timeouts still returns down.
+func IsNetworkOrHostDown(err error, expectTimeouts bool) bool {
 	if err == nil {
 		return false
 	}
 	if errors.Is(err, context.Canceled) {
 		return false
 	}
-
+	if expectTimeouts && errors.Is(err, context.DeadlineExceeded) {
+		return false
+	}
 	// We need to figure if the error either a timeout
 	// or a non-temporary error.
 	e, ok := err.(net.Error)