[JIT] Print out CU address in `ClassType::repr_str()` (#50194)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50194
**Summary**
`ClassType::repr_str()` prints out only the name of a `ClassType`, which
is not always enough to disambiguate it. In some situations, two
`ClassTypes` are compared and do not match despite having identical
names because they are in separate compilation units. In such cases, the
error message can seem nonsensical (e.g. `expected type T but found type
T`). This commit modifies `ClassType::repr_str()` so that it prints out
the address of the type's compilation unit to make these messages less
puzzling (e.g. `expected type T (0x239023) but found type T (0x230223)`).
**Test Plan**
This commit adds a unit test, `ClassTypeTest.IdenticalTypesDifferentCus`
that reproduces this situation.
**Fixes**
This commit fixes #46212.
Test Plan: Imported from OSS
Reviewed By: tugsbayasgalan
Differential Revision: D25933082
Pulled By: SplitInfinity
fbshipit-source-id: ec71b6728be816edd6a9c2b2d5075ead98d8bc88
