Specify permissions in GH Action workflows

[oleksandr-pavlyk]

This PR specifies permissions in GitHub Action workflows. Minimal read-all permission is set by default, and specific scope get elevated permission as needed.

This would improve OpenSSF Scorecard value for dpctl

• 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/1500/index.html

[coveralls]

coverage: 90.684%. remained the same
when pulling e8a15dc on workflow-permissions
into 114b2b1 on master.

[github-actions]

Array API standard conformance tests for dpctl=0.15.1dev3=py310h15de555_17 ran successfully.
Passed: 903
Failed: 6
Skipped: 86