Revert gh-2251

[ndgrigorian]

This PR reverts gh-2251, which dropped use of setup Miniconda action's activate-environment due to warnings that claimed the environment didn't exist

These warnings were not reflective of the creation of the environment. Since it does get created, the better approach is to ignore these warnings.

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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=0.22.0dev1=py310h93fe807_22 ran successfully.
Passed: 1246
Failed: 42
Skipped: 89

[coveralls]

coverage: 86.248%. remained the same
when pulling 5c06579 on revert-gh-2251
into db0d55e on master.

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev1=py310h93fe807_23 ran successfully.
Passed: 1245
Failed: 43
Skipped: 89

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev1=py310h93fe807_23 ran successfully.
Passed: 1245
Failed: 43
Skipped: 89

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev1=py310h93fe807_24 ran successfully.
Passed: 1243
Failed: 45
Skipped: 89

[antonwolfy]

Thank you @ndgrigorian

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev1=py310h93fe807_25 ran successfully.
Passed: 1245
Failed: 43
Skipped: 89