update redis version to use big-bang base utility container

The current redis sub-chart utilizes a gitlab/kubectl image for an upgrade job kicked off by helm. This image needs to be updated to use big-bang/base which is updated in the redis chart issue that blocks this issue.

When the redis issue is complete and new tag (14.1.0-bb.2) is created, update authservice dependencies to use this new version of redis.

Also ensure that the synker file includes the image - registry1.dso.mil/ironbank/big-bang/base:8.4