Added torch.linalg.matrix_power (#52608)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52608
**TODO**
- [x] Add OpInfo
- [x] Update documentation
- [x] Add more tests and compare against NumPy
Test Plan: Imported from OSS
Reviewed By: bdhirsh
Differential Revision: D27261532
Pulled By: heitorschueroff
fbshipit-source-id: c1e4ab297da3683f6d5751be8790602f9dc37b6b
