TEST: v1.18.x + blas variants

[h-vetinari]

Following the same scheme as #323, #304, #295, #280, #273, #267, #242, #224, #223, #199, #172, #153 & #130.

[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.

I do have some suggestions for making it better though...

For recipe/meta.yaml:

• ℹ️ The recipe is not parsable by parser conda-souschef (grayskull). This parser is not currently used by conda-forge, but may be in the future. We are collecting information to see which recipes are compatible with grayskull.
• ℹ️ The recipe is not parsable by parser conda-recipe-manager. The recipe can only be automatically migrated to the new v1 format if it is parseable by conda-recipe-manager.
• ℹ️ top-level output overrides versions pinned in the feedstock:
  ['- In section host: numpy 2.4']
  Requirement spec should not list version specifiers to respect conda-forge-pinning. If you need to force another version, please override the pin via conda_build_config.yaml.
• ℹ️ scipy output overrides versions pinned in the feedstock:
  ['- In section host: numpy 2.4']
  Requirement spec should not list version specifiers to respect conda-forge-pinning. If you need to force another version, please override the pin via conda_build_config.yaml.

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