Reduce some ambiguity in Tensor (#92266)
Summary:
A lot of other libraries have their own `xyz::Tensor` data structure. Under some rare cases, when they interop with torch, there will be compilation error such as
```
torch/csrc/api/include/torch/data/samplers/random.h(49): error: "Tensor" is ambiguous
```
Making some of the `Tensor` namespace clear will resolve this.
Test Plan: CI
Differential Revision: D42538675
Pull Request resolved: https://github.com/pytorch/pytorch/pull/92266
Approved by: https://github.com/Skylion007, https://github.com/malfet
