Added step to display version of clang-format used in pre-commit workflow

[oleksandr-pavlyk]

Given unexpected pre-commit failure in #1008 due to clang-format, add a step to pre-commit.yaml workflow to output the version of clang-format used.

This would allow to quickly tell if the pre-commit failure was caused by version update of clang-format in GitHub runner image.

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[oleksandr-pavlyk]

clang-format was updated to 14.0.0-1ubuntu1.

clang-format started to change some source files which were up-to-snuff with earlier version. This likely means that our file .clang-format should be more stringent.

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1009/index.html

[oleksandr-pavlyk]

The update to clang-format came with update of ubuntu-latest image to Ubuntu 22.04. Hence fixed it to Ubuntu 20.04, as this is the version we currently develop on.

[coveralls]

Coverage remained the same at 82.032% when pulling 54bcbef on add-diagonostic-clang-format into e02b00a on master.

[github-actions]

Array API standard conformance tests for dpctl=0.14.0=py310h8c27c75_28 ran successfully.
Passed: 33
Failed: 801
Skipped: 3138

[github-actions]

Array API standard conformance tests for dpctl=0.14.0=py310h8c27c75_29 ran successfully.
Passed: 33
Failed: 801
Skipped: 280

[github-actions]

Array API standard conformance tests for dpctl=0.14.0=py310h8c27c75_29 ran successfully.
Passed: 33
Failed: 801
Skipped: 280

[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_29 ran successfully.
Passed: 33
Failed: 801
Skipped: 280