Deploys are broken in customers.gitlab.com

It appears that the last few MRs that merged to `master` in https://gitlab.com/gitlab-org/customers-gitlab-com didn't get deployed to customers.gitlab.com.  The last commit that was deployed was [this one](https://gitlab.com/gitlab-org/customers-gitlab-com/-/commit/63d3fee5ea8fc9f365776c56cf081f12feddad5d).  It appears that this stopped working late on Friday, June 19th.

I don't know much about the specifics for how the deploys work but I think it has to do with a problem with the chef-client.  There is a lot of chef related warnings and errors in `/var/log/syslog`, but maybe this snippet is helpful:
```
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: ================================================================================#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[31mRecipe Compile Error in /var/chef/cache/cookbooks/gitlab_walg/recipes/default.rb#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: ================================================================================#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mMixlib::ShellOut::ShellCommandFailed#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: ------------------------------------#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: Expected process to exit with [0], but received '1'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m---- Begin output of gsutil cp gs://gitlab-ops-secrets/gitlab-walg/ops.enc - | gcloud kms decrypt       --keyring=gitlab-secrets       --key=ops       --location=global       --plaintext-file=-       --ciphertext-file=- ----
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mSTDOUT:
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mSTDERR: ServiceException: 401 Anonymous caller does not have storage.objects.get access to the Google Cloud Storage object.
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mERROR: (gcloud.kms.decrypt) The required property [project] is not currently set.
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mYou may set it for your current workspace by running:
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  $ gcloud config set project VALUE
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mor it can be set temporarily by the environment variable [CLOUDSDK_CORE_PROJECT]
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m---- End output of gsutil cp gs://gitlab-ops-secrets/gitlab-walg/ops.enc - | gcloud kms decrypt       --keyring=gitlab-secrets       --key=ops       --location=global       --plaintext-file=-       --ciphertext-file=- ----
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mRan gsutil cp gs://gitlab-ops-secrets/gitlab-walg/ops.enc - | gcloud kms decrypt       --keyring=gitlab-secrets       --key=ops       --location=global       --plaintext-file=-       --ciphertext-file=- returned 1#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0mCookbook Trace:#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: ---------------#033[0m
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]:   /var/chef/cache/cookbooks/gitlab_secrets/libraries/secrets.rb:69:in `get'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  /var/chef/cache/cookbooks/gitlab_secrets/libraries/secrets.rb:87:in `get_secrets'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  /var/chef/cache/cookbooks/gitlab_secrets/libraries/secrets.rb:98:in `block in merge_secrets'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  /var/chef/cache/cookbooks/gitlab_secrets/libraries/secrets.rb:94:in `each'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  /var/chef/cache/cookbooks/gitlab_secrets/libraries/secrets.rb:94:in `merge_secrets'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  /var/chef/cache/cookbooks/gitlab_walg/recipes/walg_env.rb:7:in `from_file'
Jun 20 08:27:07 customers.gitlab.com chef-client[30504]: #033[0m  /var/chef/cache/cookbooks/gitlab_walg/recipes/default.rb:42:in `from_file'#033[0m
```

Story points: 1.0