Integration Gateway does not take existing secret

[mkeats-clumio]

Falcon integration gateway does not take an existing secret and expects the credentials to be passed in the values. This doesn't work well with certain gitops workflows.

https://github.com/CrowdStrike/falcon-helm/blob/main/helm-charts/falcon-image-analyzer/values.yaml#L141 shows the correct way to do this. In general there is weak consistency between the charts in this repo with how they take configuration