[LTC] Remove tensor.storage_ (#87645)
Summary:
Since LTC now supports functionalization, we don't need to fake a storage to support is_alias_of anymore. Let's remove it.
Test Plan:
./build/bin/test_lazy --gtest_filter=LazyOpsTest.IsAliasOf
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87645
Approved by: https://github.com/JackCaoG, https://github.com/bdhirsh
