use scoped errors in struct conversion

test/error/struct_extra_named_field.sv

 // pattern: pattern '\{..x: 1,..y: 2.\} has extra named fields \["y"\] that are not in struct packed \{..logic x;.\}
+// location: struct_extra_named_field.sv:4:5
 module top;
     struct packed {
         logic x;

test/error/struct_extra_unnamed_field.sv

 // pattern: pattern '\{..1,..2.\} doesn't have the same number of items as struct packed \{..logic x;.\}
+// location: struct_extra_unnamed_field.sv:4:5
 module top;
     struct packed {
         logic x;

test/error/struct_invalid_key.sv

 // pattern: invalid pattern key -1 is not a type, field name, or index
+// location: struct_invalid_key.sv:4:5
 module top;
     struct packed {
         logic x;

test/error/struct_logic_bit.sv

 // pattern: illegal access to bit 0 of s\.x, which has type logic
+// location: struct_logic_bit.sv:7:13
 module top;
     struct packed {
         logic x;

test/error/struct_logic_part_range.sv

 // pattern: illegal access to range \[0:0\] of s\.x, which has type logic
+// location: struct_logic_part_range.sv:7:13
 module top;
     struct packed {
         logic x;

test/error/struct_logic_part_select.sv

 // pattern: illegal access to range \[0\+:1\] of s\.x, which has type logic
+// location: struct_logic_part_select.sv:7:13
 module top;
     struct packed {
         logic x;

test/error/struct_missing_field.sv

 // pattern: couldn't find field 'y' from struct definition struct packed \{..logic x;..logic y;.\} in struct pattern '\{..x: 1.\}
+// location: struct_missing_field.sv:4:5
 module top;
     struct packed {
         logic x, y;

test/error/struct_non_integer.sv

 // pattern: pattern index 1'bx is not an integer
+// location: struct_non_integer.sv:4:5
 module top;
     struct packed {
         logic x;

test/error/struct_out_of_bounds.sv

 // pattern: pattern index 1 is out of bounds for struct packed \{..logic x;.\}
+// location: struct_out_of_bounds.sv:4:5
 module top;
     struct packed {
         logic x;

test/error/struct_out_of_bounds_neg.sv

 // pattern: pattern index -1 is out of bounds for struct packed \{..logic x;.\}
+// location: struct_out_of_bounds_neg.sv:4:5
 module top;
     struct packed {
         logic x;

test/error/struct_unknown_field.sv

 // pattern: field 'y' not found in struct packed \{..logic x;.\}
+// location: struct_unknown_field.sv:8:5
 module top;
     struct packed {
         logic x;