[Core] RGB Matrix limit basic indicators to the last render (#21169)

Co-authored-by: Joel Challis <git@zvecr.com>

quantum/led_matrix/led_matrix.c

@@ -366,7 +366,10 @@ void led_matrix_task(void) {
         case RENDERING:
             led_task_render(effect);
             if (effect) {
-                led_matrix_indicators();
+                // Only run the basic indicators in the last render iteration (default there are 5 iterations)
+                if (led_effect_params.iter == LED_MATRIX_LED_PROCESS_MAX_ITERATIONS) {
+                    led_matrix_indicators();
+                }
                 led_matrix_indicators_advanced(&led_effect_params);
             }
             break;

quantum/led_matrix/led_matrix.h

@@ -42,8 +42,9 @@
 #endif
 
 #ifndef LED_MATRIX_LED_PROCESS_LIMIT
-#    define LED_MATRIX_LED_PROCESS_LIMIT (LED_MATRIX_LED_COUNT + 4) / 5
+#    define LED_MATRIX_LED_PROCESS_LIMIT ((LED_MATRIX_LED_COUNT + 4) / 5)
 #endif
+#define LED_MATRIX_LED_PROCESS_MAX_ITERATIONS ((LED_MATRIX_LED_COUNT + LED_MATRIX_LED_PROCESS_LIMIT - 1) / LED_MATRIX_LED_PROCESS_LIMIT)
 
 #if defined(LED_MATRIX_LED_PROCESS_LIMIT) && LED_MATRIX_LED_PROCESS_LIMIT > 0 && LED_MATRIX_LED_PROCESS_LIMIT < LED_MATRIX_LED_COUNT
 #    if defined(LED_MATRIX_SPLIT)

quantum/rgb_matrix/rgb_matrix.c

@@ -428,7 +428,10 @@ void rgb_matrix_task(void) {
         case RENDERING:
             rgb_task_render(effect);
             if (effect) {
-                rgb_matrix_indicators();
+                // Only run the basic indicators in the last render iteration (default there are 5 iterations)
+                if (rgb_effect_params.iter == RGB_MATRIX_LED_PROCESS_MAX_ITERATIONS) {
+                    rgb_matrix_indicators();
+                }
                 rgb_matrix_indicators_advanced(&rgb_effect_params);
             }
             break;

quantum/rgb_matrix/rgb_matrix.h

@@ -49,8 +49,9 @@
 #endif
 
 #ifndef RGB_MATRIX_LED_PROCESS_LIMIT
-#    define RGB_MATRIX_LED_PROCESS_LIMIT (RGB_MATRIX_LED_COUNT + 4) / 5
+#    define RGB_MATRIX_LED_PROCESS_LIMIT ((RGB_MATRIX_LED_COUNT + 4) / 5)
 #endif
+#define RGB_MATRIX_LED_PROCESS_MAX_ITERATIONS ((RGB_MATRIX_LED_COUNT + RGB_MATRIX_LED_PROCESS_LIMIT - 1) / RGB_MATRIX_LED_PROCESS_LIMIT)
 
 #if defined(RGB_MATRIX_LED_PROCESS_LIMIT) && RGB_MATRIX_LED_PROCESS_LIMIT > 0 && RGB_MATRIX_LED_PROCESS_LIMIT < RGB_MATRIX_LED_COUNT
 #    if defined(RGB_MATRIX_SPLIT)