Cleanup: add iterator macros to clang-format

Also rename START to BEGIN (matching BEGIN/END for most iterator macros).

.clang-format

@@ -191,6 +191,7 @@ ForEachMacros:
   - FOREACH_MAIN_ID_BEGIN
   - FOREACH_MAIN_LISTBASE_BEGIN
   - FOREACH_MAIN_LISTBASE_ID_BEGIN
+  - FOREACH_MESH_BUFFER_CACHE
   - FOREACH_NODETREE_BEGIN
   - FOREACH_OBJECT_BEGIN
   - FOREACH_OBJECT_FLAG_BEGIN
@@ -213,6 +214,7 @@ ForEachMacros:
   - GHASH_ITER_INDEX
   - GPU_SELECT_LOAD_IF_PICKSEL_LIST
   - GP_EDITABLE_STROKES_BEGIN
+  - GP_EVALUATED_STROKES_BEGIN
   - GSET_FOREACH_BEGIN
   - GSET_ITER
   - GSET_ITER_INDEX
@@ -236,7 +238,6 @@ ForEachMacros:
   - LISTBASE_FOREACH_BACKWARD
   - LISTBASE_FOREACH_MUTABLE
   - LISTBASE_FOREACH_BACKWARD_MUTABLE
-  - MAN2D_ITER_AXES_BEGIN
   - MAN_ITER_AXES_BEGIN
   - NODE_INSTANCE_HASH_ITER
   - NODE_SOCKET_TYPES_BEGIN
@@ -244,6 +245,7 @@ ForEachMacros:
   - NODE_TYPES_BEGIN
   - PIXEL_LOOPER_BEGIN
   - PIXEL_LOOPER_BEGIN_CHANNELS
+  - RENDER_PASS_ITER_BEGIN
   - RNA_BEGIN
   - RNA_PROP_BEGIN
   - RNA_STRUCT_BEGIN
@@ -252,6 +254,7 @@ ForEachMacros:
   - SCULPT_VERTEX_NEIGHBORS_ITER_BEGIN
   - SEQP_BEGIN
   - SEQ_BEGIN
+  - SURFACE_QUAD_ITER_BEGIN
   - foreach
 
 # Use once we bump the minimum version to version 8.