[ConstraintSystem] Add index value (as an impact of the score kind) to output of debug constraints. (swiftlang#78740)

* [ConstraintSystem] Add index value (as an impact of the score kind) to debug constraints.

* Use weight instead of index, change label 'value' -> 'impact'

* Fix debug constraints output format: remove 'components' and add 'weight' label

Author: kntkymt

include/swift/Sema/ConstraintSystem.h

@@ -1196,9 +1196,11 @@ struct Score {
     bool hasNonDefault = false;
     for (unsigned int i = 0; i < NumScoreKinds; ++i) {
       if (Data[i] != 0) {
-        out << " [component: ";
+        out << " [";
         out << getNameFor(ScoreKind(i));
-        out << "(s), value: ";
+        out << "(s), weight: ";
+        out << std::to_string(NumScoreKinds - i);
+        out << ", impact: ";
         out << std::to_string(Data[i]);
         out << "]";
         hasNonDefault = true;