Overloads for array-scalar and scalar-array broadcast element-wise functions

[ndgrigorian]

Supersedes #1814

This pull request implements overloads for broadcast arrays and scalars for element-wise functions, and adds kernels for these overloads for addition.

Also refactors how the type maps for in-place operators are implemented to improve code readability.

• [X] Have you provided a meaningful PR description?
• [ ] 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?
• [X] 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=0.18.0dev0=py310hdf72452_384 ran successfully. Passed: 869 Failed: 26 Skipped: 119

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.18.0dev0=py310hdf72452_374 ran successfully. Passed: 868 Failed: 27 Skipped: 119

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.18.0dev0=py310hdf72452_374 ran successfully. Passed: 894 Failed: 1 Skipped: 119

[coveralls]

coverage: 87.9%. remained the same when pulling 72809a43d08b7debfdf0b25ddc44609bfc942f1e on scalar-overloads-for-elementwise-funcs into 2588eb5db0d17322128e3f0974242aedca126b23 on master.

[ndgrigorian]

Superseded by #1815

Array-scalar and scalar-array overloads to be investigated further for possibility of performance optimization.