Ingest secrets from dogfood deployment repo into GSM

Created by: ElizabethStirling

Data entry task, enter the secrets used to deploy dogfood into the secret manager in the GCP project sourcegraph-dogfood. Bonus points for designing and documenting a naming pattern for our secrets.

Dependencies #17797 (closed)

Useful Links:

Repository: deploy-sourcegraph-dogfood-k8s-2