Fix: #52111
Fix: 5dbc7b42

The above commit caused the size of the `CodeGenerator` method cache
to explode, because the dynamic namespace is way too granular.

But there is actually a much better fix for that, since `alias_attribute`
is now generating exactly the same code as the attribute it's aliasing,
we can generated it as the canonical method in the cache, and then just
define it in the model as the aliased name.

This prevent the cache from growing a lot, and even reduce memory
usage further as the original attribute and its alias now share
the same method cache.