[test] fix strong constraint

Author: amin1377

vtr_flow/tasks/regression_tests/vtr_reg_strong/strong_vpr_constraint/config/config.txt

@@ -24,4 +24,4 @@ qor_parse_file=qor_standard.txt
 pass_requirements_file=pass_requirements.txt
 
 # Script parameters
-script_params_common =-starting_stage vpr --route_chan_width 300 --max_router_iterations 400 --router_lookahead map --initial_pres_fac 1.0 --router_profiler_astar_fac 1.5 --seed 3 --read_vpr_constraints ../../../../floor_plan.xml:../../../../route_constraint.xml --write_vpr_constraints vpr_constraints.xml --clock_modeling ideal
+script_params_common =-starting_stage vpr --route_chan_width 300 --max_router_iterations 400 --router_lookahead map --initial_pres_fac 1.0 --router_profiler_astar_fac 1.5 --seed 3 --read_vpr_constraints ../../../../vpr_constraints.xml --write_vpr_constraints vpr_constraints.xml --clock_modeling ideal

vtr_flow/tasks/regression_tests/vtr_reg_strong/strong_vpr_constraint/floor_plan.xml

@@ -0,0 +1,13 @@
+<vpr_constraints tool_name="vpr">
+    <partition_list>
+        <partition name="part0">
+            <add_atom name_pattern="d_o"/>
+            <add_region x_high="1" x_low="1" y_high="1" y_low="1"/>
+        </partition>
+    </partition_list>
+    <global_route_constraints>
+        <!-- specify route method for a global pin that needs to be connected globally -->
+        <set_global_signal name="(int_clk)(.*)" route_model="route"/>
+        <set_global_signal name="clk_ni" route_model="ideal"/>
+    </global_route_constraints>
+</vpr_constraints>