- There are a number of cases where the OIDC discovery url returns one
   issuer, but its desirable to use a separately configured / named
   issuer for validation instead.

   There are cases in Azure where this is necessary due to their
   non-standard OIDC configuration -- which is why this was originally
   added:
   https://github.com/coreos/go-oidc/pull/315

   There are also cases where it's necessary to use an in-cluster
   service address, but browser clients are using the external ingress
   address. Due to cluster DNS configuration, it's possible that
   flyteadmin may be unable to resolve or use the public ingress
   address for an Idp, but the internal service address is available.
   This configuration change allows for that.

 - Regenerated flyteadmin code through mise with:
   mise x go@1.22 -- make generate

Signed-off-by: ddl-ebrown <ethan.brown@dominodatalab.com>