Resolves gh-1439

[ndgrigorian]

This pull request makes changes to sin and expm1 to properly treat real and complex -0 inputs.

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1477/index.html

[coveralls]

coverage: 85.942%. remained the same
when pulling 1c4b0ab on resolve-gh-1439
into 5ec9fd5 on master.

[github-actions]

Array API standard conformance tests for dpctl=0.15.1dev2=py310h15de555_18 ran successfully.
Passed: 874
Failed: 57
Skipped: 59

[github-actions]

Array API standard conformance tests for dpctl=0.15.1dev2=py310h15de555_18 ran successfully.
Passed: 874
Failed: 57
Skipped: 59