split_3x5_3 layout support (#9624)

* Add split_3x5_3 support to Minidox

* Add split_3x5_3 support to Miniaxe

* Add LAYOUT_mini to Centromere

This layout macro removes the need or KC_NO keycodes in the keymap.

* Add split_3x5_3 support to Centromere

* Add split_3x5_3 support to suihankey split

* Add LAYOUT_mini to centromere/info.json

* Add LAYOUT_mini to crkbd

* Add split_3x5_3 support to crkbd

* Change mini layout names

* Rename main layouts for split_3x6_3 keyboards

* Use split_3x5_3 macro for remaining keyboards

* Update relevant info.json files

* Fix suihankey/split/alpha macro

* Add layout aliases for suihankey

keyboards/suihankey/split/info.json

@@ -5,7 +5,7 @@
     "width": 13.2,
     "height": 4.85,
     "layouts": {
-        "LAYOUT": {
+        "LAYOUT_split_3x5_3": {
             "layout": [
                 {"x": 0, "y": 0.375},
                 {"x": 1, "y": 0.125},