Implemented floor_divide() function.

[npolina4]

Implemented floor_divide() function and tests for it

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• Have you tested your changes locally for CPU and GPU devices?
• Have you made sure that new changes do not introduce compiler warnings?
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[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1221/index.html

[coveralls]

coverage: 84.037% (+0.002%) from 84.035% when pulling 1c18270 on implemented_floor_divide into 1596a13 on master.

[github-actions]

Array API standard conformance tests for dpctl=0.14.3dev3=py310h7bf5fec_9 ran successfully.
Passed: 261
Failed: 739
Skipped: 116

[oleksandr-pavlyk]

Please run your changes through the linter.

[antonwolfy]

LGTM!

[github-actions]

Array API standard conformance tests for dpctl=0.14.3dev3=py310h7bf5fec_19 ran successfully.
Passed: 276
Failed: 724
Skipped: 119

[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=0.14.3dev3=py310h7bf5fec_31 ran successfully.
Passed: 346
Failed: 654
Skipped: 119