refactor: rename files to follow Go convention

testdata/flag_param.go

@@ -0,0 +1,11 @@
+package fixtures
+
+func foo(a bool, b int) { // MATCH /parameter 'a' seems to be a control flag, avoid control coupling/
+	if a {
+
+	}
+}
+
+func foo(a bool, b int) {
+	str := mystruct{a, b}
+}