patch 8.2.3955: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more errors to errors.h.
diff --git a/src/debugger.c b/src/debugger.c
index e21dd22..57a94a1 100644
--- a/src/debugger.c
+++ b/src/debugger.c
@@ -815,7 +815,7 @@
     }
 
     if (todel < 0)
-	semsg(_("E161: Breakpoint not found: %s"), eap->arg);
+	semsg(_(e_breakpoint_not_found_str), eap->arg);
     else
     {
 	while (gap->ga_len > 0)