fix/ignore: Replace Bourbon mixins with Autoprefixer warnings

WARNING: [Bourbon] [Deprecation] `hyphens` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `placeholder` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform-origin` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform-origin` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform-origin` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform-origin` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform-origin` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transform-origin` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.
WARNING: [Bourbon] [Deprecation] `transition` is deprecated and will be removed in 5.0.0. We suggest using an automated prefixing tool, like Autoprefixer.

This warning is appearing 31 times during provisioning. It clutters logs and hinders dev experience (https://github.com/openedx/edx-platform/issues/32888).

A decision needs to be made on whether we ignore this warning or not.

AC

• The warnings stop cluttering logs

Inspect the provisioning path that emits the 31 Bourbon deprecation warnings and identify how its Sass tooling handles these mixins. Decide whether to suppress the warnings or replace the mixins with Autoprefixer, then verify that provisioning logs no longer contain them.