[RFE] gRPC code to be running as a sidecar

[romdalf]

-->Is it linked to a user story? (use the "#" to tag the user story)

#50 - Result of Design meeting held on June 9th 2022 with @cvlc @mhmxs @vfiftyfive @rovandep

-->What do we want to build?

gRPC code to be decoupled from Trousseau code to a dedicated binary running in a sidecar

-->Why do we want to build it?

Provide flexibility with:

• improving the unix socket handling in case of crash
• handling kubernetes api manager calls in case of failures of any Trousseau's components or with the KMS serverby
  • reconnecting before kubernetes times out on the request
  • implement retry, failover, circuit breaker to find a ready instance as quickly as possible

-->How do we want to design it?

Decoupled Trousseau's gRPC code into a separate independent binary to run as a sidecar