patch 8.2.4246: one error message not in errors.h

Problem:    One error message not in errors.h. (Antonio Colombo)
Solution:   Move the message and rename.
diff --git a/src/if_perl.xs b/src/if_perl.xs
index 37b9cb2..c717770 100644
--- a/src/if_perl.xs
+++ b/src/if_perl.xs
@@ -1030,7 +1030,6 @@
 #ifdef DYNAMIC_PERL
 static char *e_noperl = N_("Sorry, this command is disabled: the Perl library could not be loaded.");
 #endif
-static char *e_perlsandbox = N_("E299: Perl evaluation forbidden in sandbox without the Safe module");
 
 /*
  * ":perl"
@@ -1084,7 +1083,7 @@
 	safe = perl_get_sv("VIM::safe", FALSE);
 # ifndef MAKE_TEST  /* avoid a warning for unreachable code */
 	if (safe == NULL || !SvTRUE(safe))
-	    emsg(_(e_perlsandbox));
+	    emsg(_(e_perl_evaluation_forbidden_in_sandbox_without_safe_module));
 	else
 # endif
 	{
@@ -1361,7 +1360,7 @@
 	    safe = get_sv("VIM::safe", FALSE);
 # ifndef MAKE_TEST  /* avoid a warning for unreachable code */
 	    if (safe == NULL || !SvTRUE(safe))
-		emsg(_(e_perlsandbox));
+		emsg(_(e_perl_evaluation_forbidden_in_sandbox_without_safe_module));
 	    else
 # endif
 	    {