update STA script to add reports to `./signoff/<design_name>/primetime-signoff/`

update STA script to report coverage and timing summary

scripts/pt_sta.tcl

@@ -230,6 +230,9 @@ if {\
 
     }
     proc report_results {design rc_corner proc_corner} {
+      report_global_timing -separate_all_groups -significant_digits 4 > $::env(OUT_DIR)/reports/${rc_corner}/${design}.${proc_corner}${proc_corner}-global.rpt
+      report_analysis_coverage -significant_digits 4 -nosplit -status_details {untested} > $::env(OUT_DIR)/reports/${rc_corner}/${design}.${proc_corner}${proc_corner}-coverage.rpt
+
       report_constraint -all_violators -significant_digits 4 -nosplit > $::env(OUT_DIR)/reports/${rc_corner}/${design}.${proc_corner}${proc_corner}-all_viol.rpt
 
       report_timing -delay min -path_type full_clock_expanded -transition_time -capacitance -nets -nosplit \

scripts/signoff_automation.py

@@ -151,7 +151,7 @@ def run_sta(caravel_root, mcw_root, pt_lib_root, log_dir, signoff_dir, design):
         "-d",
         f"{design}",
         "-o",
-        f"{signoff_dir}/{design}/standalone_pvr",
+        f"{signoff_dir}/{design}",
         "-l",
         f"{log_dir}",
     ]