Expose traffic policy configuration for service

[denis256]

Description

Update k8s-service helm chart to allow configuration of traffic policies for created K8S service

TODOs

Read the Gruntwork contribution guidelines.

• [ ] Update the docs.
• [ ] Run the relevant tests successfully, including pre-commit checks.
• [ ] Ensure any 3rd party code adheres with our license policy or delete this line if its not applicable.
• [ ] Include release notes. If this PR is backward incompatible, include a migration guide.

Release Notes (draft)

Added / Removed / Updated [X].

Migration Guide