[vm] Use Hash as TypeArguments canonicalization hash

Fixes #55666

TEST=ci

Change-Id: Ib7d53e14f5be0f56851576dec2e6a3f136b41e44
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/366301
Commit-Queue: Slava Egorov <[email protected]>
Reviewed-by: Ryan Macnak <[email protected]>

Author: mraleph

runtime/vm/object.h

@@ -8970,10 +8970,7 @@ class TypeArguments : public Instance {
                                  (len * kBytesPerElement));
   }
 
-  virtual uint32_t CanonicalizeHash() const {
-    // Hash() is not stable until finalization is done.
-    return 0;
-  }
+  virtual uint32_t CanonicalizeHash() const { return Hash(); }
   uword Hash() const;
   uword HashForRange(intptr_t from_index, intptr_t len) const;
   static intptr_t hash_offset() {