tree-wide: make use of new STRLEN() macro everywhere (#7639)

Let's employ coccinelle to do this for us.

Follow-up for #7625.

src/network/networkctl.c

@@ -340,7 +340,7 @@ static int list_links(int argc, char *argv[], void *userdata) {
 /* IEEE Organizationally Unique Identifier vendor string */
 static int ieee_oui(sd_hwdb *hwdb, const struct ether_addr *mac, char **ret) {
         const char *description;
-        char modalias[strlen("OUI:XXYYXXYYXXYY") + 1], *desc;
+        char modalias[STRLEN("OUI:XXYYXXYYXXYY") + 1], *desc;
         int r;
 
         assert(ret);