Disable antenna violation fixups

Detailed routing is getting stuck
diff --git a/openlane/user_project_wrapper/config.tcl b/openlane/user_project_wrapper/config.tcl
index 07ee6fd..942d828 100755
--- a/openlane/user_project_wrapper/config.tcl
+++ b/openlane/user_project_wrapper/config.tcl
@@ -119,3 +119,5 @@
 } else {
 	set ::env(ROUTING_CORES) 24
 }
+
+set ::env(DIODE_INSERTION_STRATEGY) 0