feat: add rbac tracing (#4093)

coderd/tracing/util.go

@@ -17,3 +17,16 @@ func FuncName() string {
 	}
 	return name
 }
+
+func FuncNameSkip(skip int) string {
+	fnpc, _, _, ok := runtime.Caller(1 + skip)
+	if !ok {
+		return ""
+	}
+	fn := runtime.FuncForPC(fnpc)
+	name := fn.Name()
+	if i := strings.LastIndex(name, "/"); i > 0 {
+		name = name[i+1:]
+	}
+	return name
+}