Pin compiler for 0.22.0 release

[ndgrigorian]

Pin DPC++ compiler used to 2026.0.0

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• Have you made sure that new changes do not introduce compiler warnings?
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• Have you added documentation for your changes, if necessary?
• Have you added your changes to the changelog?
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[github-actions]

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

[coveralls]

Coverage is 77.338% — pin-compiler-for-0.22.0-release into maintenance/0.22.x. No base build found for maintenance/0.22.x.