test_async_submit is to try few times before failing

[oleksandr-pavlyk]

test_sycl_kernel_submit::test_async_submit sporadically fails on Windows where in kernels finish execution before test checks are done. Typical remedy is to restart Windows tests and after few iterations they pass.

This PR changes the tests to attempt launching kernels few times and rechecking tests condition before asserting test failure.

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1290/index.html

[coveralls]

coverage: 83.195%. remained the same when pulling 0bdc6a1 on tweak-test-submit-async-take-2 into f52182d on master.

[github-actions]

Array API standard conformance tests for dpctl=0.14.5=py310h7bf5fec_2 ran successfully.
Passed: 448
Failed: 552
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=0.14.6dev0=py310h7bf5fec_7 ran successfully.
Passed: 474
Failed: 526
Skipped: 119