Merge pull request #2960 from The-OpenROAD-Project-staging/loose-ng-bp-fe

The previous tightening went too far on nangate45/bp_fe_top

Author: maliberty

flow/designs/nangate45/bp_fe_top/rules-base.json

@@ -60,7 +60,7 @@
         "compare": "<="
     },
     "finish__timing__drv__hold_violation_count": {
-        "value": 309,
+        "value": 1792,
         "compare": "<="
     },
     "finish__timing__wns_percent_delay": {