Add support for key override introspection. (#24120)

docs/ChangeLog/PR24120.md

@@ -0,0 +1,19 @@
+## Changes requiring user action
+
+### Key Override Introspection
+
+Changes were made to key overrides in order to hook them into the keymap introspection system.
+
+Key override signature changed from:
+
+```c
+const key_override_t **key_overrides = (const key_override_t *[]){
+```
+
+to:
+
+```c
+const key_override_t *key_overrides[] = {
+```
+
+The list of key overrides now does not need to be `NULL`-terminated.