Don't use vector accessor methods to do pointer math; unblock platform010 (#73414)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/73414
The code here previously used this creative pointer math
```
const auto end = reinterpret_cast<uintptr_t>(&managed_tensor_storage_impls_.at(managed_tensor_storage_impls_.size()));
```
This has the form
```
const auto end = &A[N];
```
this works just fine if `A` is C-style array since `&A[N]` can get transformed to `(A+N)` where `A` is a simple pointer without ever dereferencing.
But this is C++ and `A` is a vector, so `A[N]` calls the accessor method, reaches into an illegal place in memory, and then we get the address of that. (Or so I deduce.)
We sidestep the issue by using `data()` to get the desired memory address directly.
Test Plan: Sandcastle
Reviewed By: meyering
Differential Revision: D34468166
fbshipit-source-id: d1bcbdceddd7c1da8204f90a446793945ebe9a34
(cherry picked from commit e93cc37bf266292bbf26ea26cc1335d9f5273ee9)
