Add support for Torch 1.10.2

[VivekPanyam]

Summary:

This PR adds support for Torch 1.10.2 and adds a build to the CI matrix to test it

Test Plan:

CI

[tgaddair]

Thanks for putting this PR together, @VivekPanyam. Is this good to go, or are there issues that need to be addressed? (never sure with CI what's flaky and what's not)

[VivekPanyam]

Thanks for putting this PR together, @VivekPanyam. Is this good to go, or are there issues that need to be addressed? (never sure with CI what's flaky and what's not)

Need to land #532 first (pip broke on py3.6 because of EOL + a python ppa changed and broke CI). We're running CI on GPU spot instances and they've been getting terminated a lot over the last few days so it's taking a bit longer than expected for builds to pass.

Hopefully we'll be able to get this out by the end of the week

[tgaddair]

Awesome, that sounds great. Thanks for the update.

[codecov]

Codecov Report

Merging #531 (1df5469) into master (925ca9f) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #531   +/-   ##
=======================================
  Coverage   86.58%   86.58%           
=======================================
  Files         104      104           
  Lines        6940     6940           
=======================================
  Hits         6009     6009           
  Misses        931      931           

Impacted Files	Coverage Δ
...urce/neuropod/backends/torchscript/torch_tensor.hh	72.72% <ø> (ø)
source/neuropod/internal/backend_registration.cc	86.00% <100.00%> (ø)

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