Clarify path param naming (#32969)

In history (from some legacy frameworks), both `:name` and `name` are
supported as path path name, `:name` is an alias to `name`.

To make code consistent, now we should only use `name` but not `:name`.

Also added panic check in related functions to make sure the name won't
be abused in case some downstreams still use them.

modules/setting/setting.go

@@ -235,3 +235,9 @@ func checkOverlappedPath(name, path string) {
 	}
 	configuredPaths[path] = name
 }
+
+func PanicInDevOrTesting(msg string, a ...any) {
+	if !IsProd || IsInTesting {
+		panic(fmt.Sprintf(msg, a...))
+	}
+}