Buildkite CI: Redeploy cluster with support for SSL certificates (git fetch over https)

[bkase]

Build agents in our cluster cannot use https at the moment.

See #4914 for a workaround of disabling https verify that we should remove when the cluster is fixed.

Epic: #4762

[O1ahmad]

May be missing the issue here but this appears to be resolved with the latest updates to the Buildkite agent cluster.

root@gke-east-buildkite-large-agent-9cdc58cbf-4pbbm:/test/coda# git config http.sslVerify true
root@gke-east-buildkite-large-agent-9cdc58cbf-4pbbm:/test/coda# git config --get http.sslVerify
true

root@gke-east-buildkite-large-agent-9cdc58cbf-4pbbm:/test/coda# git fetch origin
remote: Enumerating objects: 78, done.
remote: Counting objects: 100% (78/78), done.
remote: Compressing objects: 100% (46/46), done.
remote: Total 78 (delta 32), reused 78 (delta 32), pack-reused 0
Unpacking objects: 100% (78/78), done.
From https://github.com/CodaProtocol/coda
 * [new branch]          rosetta/initial -> origin/rosetta/initial

root@gke-east-buildkite-large-agent-9cdc58cbf-4pbbm:/test/coda# git fetch origin feature/ci-buildkite-unit-tests
From https://github.com/CodaProtocol/coda
 * branch                feature/ci-buildkite-unit-tests -> FETCH_HEAD