Improve coverage sycl interface

[oleksandr-pavlyk]

This PR extends test_sycl_queue_submit to use 1D range, 2D range, 3D range and use dependent events.

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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_80 ran successfully.
Passed: 906
Failed: 0
Skipped: 94

[oleksandr-pavlyk]

Coverage info: https://coveralls.io/builds/66187084

[oleksandr-pavlyk]

Additional changes pushed:

• Submit for float64 should only be exercised if device has needed aspect (otherwise coverage and tests can not be run on Iris Xe)
• submit local_accessor is now done for instances with ndim=1, 2, 3 getting coverage of dpctl_sycl_interface.cpp to over 90%
• Added test for DPCTLQueue_Create when context ref is nullptr, but device is not to cover few more lines

Changes to tests/CMakeLists.txt:

• Created target run-c-api-tests to run tests with environment variable set
• Created target llvm-cov-report to output per-file coverage summary and llvm-cov-show to output per-line coverage info (handly to detect which lines are not covered)
• Removed llvm-cov (it is now effectively llvm-cov-report)
• Each llvm-cov-report, llvm-cov-show and llvm-genhtml depend on run-c-api-tests

Changes to dbg_build.sh:

• Added lines to set PATH and LLVM_TOOLS_HOME env. variable so that cmake can find llvm-cov and other programs
• Replaced make llvm-genhtml with make llvm-cov-report` in the script.

[github-actions]

Array API standard conformance tests for dpctl=0.17.0dev0=py310h15de555_85 ran successfully.
Passed: 906
Failed: 0
Skipped: 94

[github-actions]

Array API standard conformance tests for dpctl=0.17.0dev0=py310h15de555_86 ran successfully.
Passed: 906
Failed: 0
Skipped: 94

[github-actions]

Array API standard conformance tests for dpctl=0.17.0dev0=py310h15de555_87 ran successfully.
Passed: 906
Failed: 0
Skipped: 94