Upgrade Redis to v7.2

We are currently shipping Redis v7.0.15, which has reached EOL in July 2024. Upgrading to v7.2 would give us some additional time to decide on our direction forward https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8466+.

Acceptance criteria

• Upgrade Omnibus gitlab-org/omnibus-gitlab!8226 (merged)
• Upgrade GitLab Chart
  • Redis 7.0: gitlab-org/charts/gitlab!3977 (merged)
  • Redis 7.2: gitlab-org/charts/gitlab!4182 (merged)