Reduce the maximum resolver rounds by an order of magnitude

This reduces how much pip will attempt to backtrack.

src/pip/_internal/resolution/resolvelib/resolver.py

@@ -88,7 +88,7 @@ def resolve(
         )
 
         try:
-            try_to_avoid_resolution_too_deep = 2000000
+            try_to_avoid_resolution_too_deep = 200000
             result = self._result = resolver.resolve(
                 collected.requirements, max_rounds=try_to_avoid_resolution_too_deep
             )