Fix CMake error in OS compiler workflow

[ndgrigorian]

This PR fixes the failing OS compiler workflow, which has been throwing a CMake error

OS compiler versioning output changed, so the Clang version is preceded by another string giving the date and specifying the compiler is the SYCL nightly compiler

This PR modifies dpctl CMake to check if the "Intel SYCL Compiler Nightly" string is in the version string. If so, the next member of the list, containing the Clang version, is used instead

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[github-actions]

Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞

[coveralls]

Changes unknown
when pulling 04a9f04 on fix-intel-sycl-compiler-cmake-os-ci
into ** on master**.

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_88 ran successfully.
Passed: 1115
Failed: 43
Skipped: 82

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_88 ran successfully.
Passed: 1115
Failed: 43
Skipped: 82

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_88 ran successfully.
Passed: 1114
Failed: 44
Skipped: 82

[antonwolfy]

No more comments from me. LGTM!

[ndgrigorian]

@antonwolfy I've made a change to make this check more robust with regex, so each index is checked for either until a match is found, and that's used as the version. I added a commit to show the version, and as you can see, it matches what it was before. (last line in each screenshot)
DPC++:

OS compiler:

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_93 ran successfully.
Passed: 1116
Failed: 42
Skipped: 82

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_100 ran successfully.
Passed: 1115
Failed: 43
Skipped: 82

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_99 ran successfully.
Passed: 1115
Failed: 43
Skipped: 82

[antonwolfy]

I have a minor nit below, but overall LGTM!

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_100 ran successfully.
Passed: 1115
Failed: 43
Skipped: 82

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_101 ran successfully.
Passed: 1116
Failed: 42
Skipped: 82

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_100 ran successfully.
Passed: 1115
Failed: 43
Skipped: 82