Fix: build fails when experimental features are disabled

Caused by using a function behind an experimental feature `ifdef`
in non-experimental code. The fix is to move the function out from
behind the `ifdef`, since it's perfectly fine to use in non-experimental
code.

source/blender/makesrna/intern/rna_action.cc

@@ -97,13 +97,13 @@ const EnumPropertyItem rna_enum_strip_type_items[] = {
 
 #  include <fmt/format.h>
 
-#  ifdef WITH_ANIM_BAKLAVA
-
 static animrig::Action &rna_action(const PointerRNA *ptr)
 {
   return reinterpret_cast<bAction *>(ptr->owner_id)->wrap();
 }
 
+#  ifdef WITH_ANIM_BAKLAVA
+
 static animrig::Slot &rna_data_slot(const PointerRNA *ptr)
 {
   BLI_assert(ptr->type == &RNA_ActionSlot);