Store sha256 checksum of Metadata in `ci_job_artifacts` table

What does this MR do?

• This stores sha256 checksum of Metadata to ci_job_artifacts.file_sha256
• Previsoualy we started storing sha256 checksum of Archive(a.k.a. artifact) but file_sha256 was not sent from Workhorse at the moment.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Review
  • Has been reviewed by Backend
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Related #43745 (moved)