Add pip check to test suite & bump to dpctl v0.22.1

[xaleryb]

This PR combines two changes:

1. Version bump to 0.22.1 — updates source to the latest dpctl release
2. Add pip check to test suite — catches undeclared or broken PyPI runtime dependencies at build time

The pip check addition was motivated by a recent issue where mkl-service 2.7.1 introduced dependencies = ["mkl"] in pyproject.toml, which breaks pip check in downstream conda environments since mkl ships no .dist-info on conda-forge. Adding this check here ensures similar regressions are caught in-recipe in the future.

Supersedes: #4, #7
See: IntelPython/mkl-service#201

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.