MGDAPI-6133 Bump default Redis to 6

[carlkyrillos]

Overview

JIRA: MGDAPI-6133

Verification

1. Provision non-CCS cluster
2. Build CRO images from this PR
3. Install RHOAM from CatalogSource but before creating the RHMI CR, patch the managed-api-service CSV with the custom CRO image
4. Verify that the RHOAM installation completes

[openshift-ci]

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[codecov]

Codecov Report

Merging #695 (5ee0ea2) into master (0b51d40) will not change coverage.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #695   +/-   ##
=======================================
  Coverage   72.52%   72.52%           
=======================================
  Files          54       54           
  Lines        7060     7060           
=======================================
  Hits         5120     5120           
  Misses       1545     1545           
  Partials      395      395           

Files	Coverage Δ
pkg/providers/openshift/provider_redis.go	80.39% <100.00%> (ø)