Avoid sycl::queue copying in libtensor

[oleksandr-pavlyk]

Changed signatures functions to take sycl::queue argument by reference, not by value.

Since sycl::queue contains a shared pointer inside, copying it involves operating atomic variable, and hence should be avoided if possible.

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[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=0.17.0dev0=py310h15de555_296 ran successfully.
Passed: 870
Failed: 8
Skipped: 92

[coveralls]

coverage: 88.049%. remained the same
when pulling ffe13ea on change-signatures-to-use-queue-ref
into 182aede on master.

[ndgrigorian]

LGTM!