* drop EOL manylinux images
* chore: use multi-arch manylinux images as a source for image tag
Using multi-arch images directly messes with parallel tests for now.
Using them as a source for image tag ensures that all architecture specific tags are pointing to the same tag for a given manylinux / musllinux policy.
* Apply review suggestion
Co-authored-by: Joe Rickerby <joerick@mac.com>
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Co-authored-by: Joe Rickerby <joerick@mac.com>