Log error getting annotations in genie-controller.go

[stevo-f3]

When getting pod annotations for CNI, Genie controller would swallow underlying error in case of len(k8sArgs.K8S_ANNOT) == 0 which can happen for many reasons.

In an incident, all new Pods were failing to be created, genie was erroring CNI Genie Add IP internal error: Error getting annotations for pod (foo:bar): No pod or env var found, result: %!!(MISSING)s(<nil>) Missing underlying error made debugging hard.

This PR:

• improves error handling in genie-controller's getPodAnnotationsForCNI to always log underlying error for getK8sPodAnnotations call
• removes logging underlying error for one case where it was already covered, not to log same error twice
• fixes a typo in an error message

[stevo-f3]

@m1093782566 @sushanthakumar @kevin-wangzefeng @vinaykul can you please take a look?