Revert "Merge branch '561028-conan-server-side-rest-api-is-no-longer-compatible-with-older-version-of-conan-client-rest' into 'master'"

Purpose of revert

Reverts Add backward compatibility for Conan v1 with re... (!218278 - merged) to fix regression .

Checklist

• 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.
• If the revert involves a database migration, please read through Deleting existing migrations.
• Add the appropriate labels before the MR is created. We can skip CI/CD jobs only if the labels are added before the CI/CD pipeline is created.

Milestone info

• I am reverting something in the current milestone. No changelog is needed, and I've added a ~"regression:*" label.
• I am reverting something in a different milestone. A changelog is needed, and I've removed the ~"regression:*" label.

Related issues and merge requests

• Original issue #561028 and MR Add backward compatibility for Conan v1 with re... (!218278 - merged)
• The issue describing regression Conan 2 Error: object of type NoneType has no l... (#587177 - closed)