Fix signedness typo in world range update (#58390)

This manifested itself as a missing invalidation downstream, but I don't
know if this is visible from Base. In general, we don't set the
InferenceState's max_world to `typemax(UInt)`, but rather to the maximum
world age at start of inference, and then we check at the end of
inference if the world age is still the same, and only then raise it to
`typemax(UInt)` (which arms the backedges). The downstream setup is a
bit more complex, and I don't entirely know where this leaked out, but
this change fixed it regardless.

Author: Keno

Compiler/src/abstractinterpretation.jl

@@ -3545,7 +3545,7 @@ function merge_override_effects!(interp::AbstractInterpreter, effects::Effects,
             # N.B.: We'd like deleted_world here, but we can't add an appropriate edge at this point.
             # However, in order to reach here in the first place, ordinary method lookup would have
             # had to add an edge and appropriate invalidation trigger.
-            valid_worlds = WorldRange(m.primary_world, typemax(Int))
+            valid_worlds = WorldRange(m.primary_world, typemax(UInt))
             if sv.world.this in valid_worlds
                 update_valid_age!(sv, valid_worlds)
             else

Compiler/src/typeinfer.jl

@@ -475,7 +475,7 @@ function adjust_effects(ipo_effects::Effects, def::Method, world::UInt)
     valid_worlds = WorldRange(0, typemax(UInt))
     if is_effect_overridden(override, :consistent)
         # See note on `typemax(Int)` instead of `deleted_world` in adjust_effects!
-        override_valid_worlds = WorldRange(def.primary_world, typemax(Int))
+        override_valid_worlds = WorldRange(def.primary_world, typemax(UInt))
         if world in override_valid_worlds
             ipo_effects = Effects(ipo_effects; consistent=ALWAYS_TRUE)
             valid_worlds = override_valid_worlds