Adds SyclDevice.partition_max_sub_devices

[oleksandr-pavlyk]

This implements #1004, by exposing dpctl.SyclDevice.partition_max_sub_devices property.

SyclInterface library gets DCPTLDevice_GetPartitionMaxSubDevices(const DPCTLSyclDeviceRef) function.

Tests are added to both dpctl and SyclInterface library.

@dmishura

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• Have you added a test, reproducer or referred to an issue with a reproducer?
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• Have you made sure that new changes do not introduce compiler warnings?

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1005/index.html

[coveralls]

Coverage increased (+0.004%) to 82.016% when pulling fc24fe9 on add-partition-max-sub-devices into a2edadb on master.

[github-actions]

Array API standard conformance tests for dpctl=0.14.0=py310h8c27c75_20 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138

[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=0.14.0=py310h8c27c75_22 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138