Revert "Merge branch 'vs/upgrade-sprockets' into 'master'"

Purpose of Revert

Reverts !99479 (merged) because upgraded sprockets gem causes problems with Omnibus pipelines due to a missing manifest.js file, for instance, !109171 (merged).

Check-list

• Create an issue to reinstate the merge request and assign it to the author of the reverted merge request.
• If the revert is to resolve a 'broken master' incident, please read through the Responsibilities of the Broken 'Master' resolution DRI
• Add the appropriate labels before the MR is created (we can only skip CI/CD jobs if the labels are added before the CI/CD pipeline gets created)