Clang Tidy: enable readability-non-const-parameter warning

Clang Tidy reported a couple of false positives. I disabled
those `NOLINTNEXTLINE`.

Differential Revision: https://developer.blender.org/D8199

source/blender/editors/include/ED_node.h

@@ -121,7 +121,7 @@ void ED_operatormacros_node(void);
 bool ED_space_node_color_sample(struct Main *bmain,
                                 struct SpaceNode *snode,
                                 struct ARegion *region,
-                                int mval[2],
+                                const int mval[2],
                                 float r_col[3]);
 
 #ifdef __cplusplus