Bugfix/gh 1874 result type

[oleksandr-pavlyk]

Closes gh-1874

If inputs consist solely of weak dtypes, pre-prepopulate dtypes lists with scalar behind the first weak_dtypes element.

Add tests that dpt.result_types(sc1, sc2) gives the same result regardless whether the scalar is a Python scalar (weak dtype), or corresponding NumPy scalar (strong dtype).

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

[github-actions[bot]]

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

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_148 ran successfully. Passed: 895 Failed: 0 Skipped: 119

[coveralls]

coverage: 87.676% (+0.003%) from 87.673% when pulling dc1887e7f65bd336239975c3727d27a171495ff5 on bugfix/gh-1874-result_type into 9eb8f0303c99a988583c7e99f14585e71f02f4d6 on master.

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_151 ran successfully. Passed: 894 Failed: 1 Skipped: 119

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_152 ran successfully. Passed: 895 Failed: 0 Skipped: 119