Add missing docstrings to SyclDevice properties

[diptorupd]

Several properties of the SyclDevice class docstring do not include the Returns attribute and deprecation notices. The PR updates the docstrings for some of the SyclDevice properties needed to address #962

Closes #962

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/964/index.html

[coveralls]

Coverage remained the same at 82.033% when pulling 91c1746 on docstrings/improve_docstrings into eb8ddb2 on master.

[github-actions]

Array API standard conformance tests for dpctl=0.14.0dev1=py310h8c27c75_3 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138

[diptorupd]

@oleksandr-pavlyk I fixed few of the docstrings, but more such changes are needed. Also, for some reason the attribute list table is rendering weirdly for me.

[github-actions]

Array API standard conformance tests for dpctl=0.14.0dev1=py310h8c27c75_2 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138

[oleksandr-pavlyk]

Thanks for cleaning this up @diptorupd . I left few comments.

[github-actions]

Array API standard conformance tests for dpctl=0.14.0dev1=py310h8c27c75_3 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138

[oleksandr-pavlyk]

LGTM! We will address the table formatting issue in a separate PR.

[github-actions]

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

[github-actions]

Array API standard conformance tests for dpctl=0.14.0dev1=py310h8c27c75_26 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138