basic: rename cap-list.c -> capability-list.c

This also renames relevant files in the same way.

Addresses https://github.com/systemd/systemd/pull/37904#discussion_r2191950396

src/nspawn/nspawn-oci.c

@@ -8,7 +8,7 @@
 
 #include "alloc-util.h"
 #include "bus-util.h"
-#include "cap-list.h"
+#include "capability-list.h"
 #include "cgroup-util.h"
 #include "cpu-set-util.h"
 #include "device-util.h"

src/nspawn/nspawn-settings.c

@@ -3,7 +3,7 @@
 #include "sd-bus.h"
 
 #include "alloc-util.h"
-#include "cap-list.h"
+#include "capability-list.h"
 #include "conf-parser.h"
 #include "cpu-set-util.h"
 #include "extract-word.h"

src/nspawn/nspawn.c

@@ -32,7 +32,7 @@
 #include "bus-error.h"
 #include "bus-locator.h"
 #include "bus-util.h"
-#include "cap-list.h"
+#include "capability-list.h"
 #include "capability-util.h"
 #include "cgroup-setup.h"
 #include "cgroup-util.h"