Summary:
When specified, the configmanager service reaches out to LaunchDarkly to fetch feature flag values.
This diff updates the YAML so that the configmanager reads the SDK key if present in a configmap.

Test Plan: testing cluster

Reviewers: nserrino, vihang

Reviewed By: vihang
Signed-off-by: Michelle Nguyen <michellenguyen@pixielabs.ai>

Differential Revision: https://phab.corp.pixielabs.ai/D11663

GitOrigin-RevId: 0ee39fd82f236abb8becf3c2db7467fe1fbade52