Use Miniforge, use conda-forge channel

[oleksandr-pavlyk]

The test_windows step of the workflow is currently broken with

  Downloading and Extracting Packages: ...working... done
  Preparing transaction: ...working... done
  Verifying transaction: ...working... done
  Executing transaction: ...working... done
  
  D:\a\dpctl\dpctl>L "C:\Users\runneradmin\miniconda3\condabin\..\Scripts\conda.exe"   install --name base "conda-build=*" 
  Warning: 'L' is not recognized as an internal or external command,
  operable program or batch file.
  
  'L' is not recognized as an internal or external command,
  operable program or batch file.
Error: The process 'C:\Users\runneradmin\miniconda3\condabin\conda.bat' failed with exit code 9009

Use miniforge and conda-forge channel only, to avoid mixing defaults and conda-forge.
Also fix steps to create sub-directories in the local channel.

---

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• 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. 🤞

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_109 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[coveralls]

coverage: 87.907%. remained the same
when pulling 05fade9 on fix-test-windows-step-in-conda-package-workflow
into f0f7837 on master.

[ndgrigorian]

@oleksandr-pavlyk
It seems to still fail with the same error message.

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_110 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_110 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_111 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_112 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_112 ran successfully.
Passed: 893
Failed: 2
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_113 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_114 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_115 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_109 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[ndgrigorian]

CI now working, LGTM!