Fix: EEVEE: Shadow: Huge performance drop caused by local lights

Punctual shadow maps were never tagged as updated, constantly
refreshing themselves.

source/blender/draw/engines/eevee_next/eevee_shadow.hh

@@ -86,6 +86,7 @@ struct ShadowTileMap : public ShadowTileMapData {
     clip_data_index = tiles_index_ / SHADOW_TILEDATA_PER_TILEMAP;
     /* Avoid uninitialized data. */
     this->grid_offset = int2(0);
+    this->grid_shift = int2(0);
     this->set_dirty();
   }
 

source/blender/draw/engines/eevee_next/shaders/eevee_shadow_tilemap_init_comp.glsl

@@ -37,6 +37,7 @@ void main()
   if (gl_LocalInvocationIndex == 0u) {
     /* Reset shift to not tag for update more than once per sync cycle. */
     tilemaps_buf[tilemap_index].grid_shift = ivec2(0);
+    tilemaps_buf[tilemap_index].is_dirty = false;
 
     directional_range_changed = 0;