Detect invalid certificate error and print better message

[aviramha]

Follow up on #2821
failure was:

⠤ mirrord exec
    ✓ running on latest (3.119.1)!
⠖ mirrord exec
    ✓ running on latest (3.119.1)!
  ⠚ preparing to launch process
  x mirrord exec
    ✓ running on latest (3.119.1)!
    x preparing to launch process
      ✓ layer extracted
      ✓ operator disabled                                                                                                                                                                     Error:   × Failed to create mirrord-agent: Kube failed: ServiceError: client error (Connect)
  help: 1. Please check the status of the agent pod, using `kubectl get pods` in the relevant namespace.
                2. If you don't see any `mirrord-agent-[...]` pods, then try running `kubectl get jobs`, and `kubectl describe mirrord-agent-[...]`.
                Make sure it is able to fetch the agent image, it didn't fail due to lack of resources, etc.
        
        - If you're still stuck:
        
        >> Please open a new bug report at https://github.com/metalbear-co/mirrord/issues/new/choose
        
        >> Or join our Discord https://discord.gg/metalbear and request help in #mirrord-help
        
        >> Or email us at hi@metalbear.co

but in logs we could see that it was invalid certificate

 DEBUG start:create_and_connect: mirrord::connection: Failed to detect OpenShift error=KubeError(Service(hyper_util::client::legacy::Error(Connect, Custom { kind: Other, error: Custom { kind: InvalidData, error: InvalidCertificate(UnknownIssuer) } })))

need to improve error experience here.

[linear]

MBE-461 Detect invalid certificate error and print better message