feat: add topology service tls secret and cell configuration to the migrations and sidekiq deployment template

Tarun Khandelwalrequested to merge
add-ts-secret-migrations into master

What does this MR do?

feat: add topology service TLS secret and cell configuration to the migrations job spec.

This is needed so when the DB migration job runs, it has:

  • Cell settings configured so it knows that sequence needs to be altered.
  • TLS secrets so the communication with the topology service can be done

See the investigation thread for more detail: https://gitlab.com/gitlab-com/gl-infra/tenant-scale/cells-infrastructure/team/-/issues/479#note_2721187221

We are also adding it to the sidekiq deployment as we would be connecting to the TS eventually from there for claiming

Related issues

Part of: https://gitlab.com/gitlab-com/gl-infra/tenant-scale/cells-infrastructure/team/-/issues/479

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