Add metadata to setup.py

[DenisScherbakov]

This is mapping of #1269 to gold/2021 branch

• Have you provided a meaningful PR description?
• Have you added a test, reproducer or referred to an issue with a reproducer?
• Have you tested your changes locally for CPU and GPU devices?
• Have you made sure that new changes do not introduce compiler warnings?
• Have you checked performance impact of proposed changes?
• If this PR is a work in progress, are you opening the PR as a draft?

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1296/index.html

[github-actions]

Array API standard conformance tests for dpctl=0.14.5=py310h7bf5fec_26 ran successfully.
Passed: 447
Failed: 553
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.14.5=py310h7bf5fec_27 ran successfully.
Passed: 448
Failed: 552
Skipped: 119

[oleksandr-pavlyk]

I pushed cherry-picked content of merged gh-1269 instead of duplicating changes that would surely create conflicts upon the next merge of master into gold/2021

[github-actions]

Array API standard conformance tests for dpctl=0.14.5=py310h7bf5fec_29 ran successfully.
Passed: 448
Failed: 552
Skipped: 119

[oleksandr-pavlyk]

I think this is ready to be merged now.

[github-actions]

Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞