* [sec_scan][20] add `ReportSecrets` forwarder to proxy's gRPC insecure server
This PR implements a `ReportSecrets` forwarder from Proxy server to Auth server.
The goal is to allow clients to hit the proxy insecure gRPC server (credentialless)
and proxy will forward requests to the AuthServer on behalf of the client. This is required
because the client doesn't have valid credentials and it wasn't possible for it to reach auth server
via reversetunnel when the cluster uses `separate` mode.
This PR is part of https://github.com/gravitational/access-graph/issues/637.
Signed-off-by: Tiago Silva <tiago.silva@goteleport.com>
* add comments
* move dial to lib/client/proxy/insecure
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Signed-off-by: Tiago Silva <tiago.silva@goteleport.com>
Gavin Frazar