Remove OIDC connection and replace with a property-defined key

OIDC requests are consistently having proxy/gateway errors, so we are replacing the solution in the short term. This key will be set in secret properties and will enable secure enough transmission without having to block on figuring out NGINX issues.

requested review from @zacharysabourin and @cguindon

approved this merge request

mentioned in commit 6e683cd0

merged