[chart/redis-ha][Request] Update to Redis 7.0

[sathieu]

Describe the bug
(marking as bug as the release fixes CVEs)

Redis 7.0 was released: https://github.com/redis/redis/blob/7.0/00-RELEASENOTES

It includes the following security fixes:

• (CVE-2022-24736) An attacker attempting to load a specially crafted Lua script
  can cause NULL pointer dereference which will result with a crash of the
  redis-server process. This issue affects all versions of Redis.
  [reported by Aviv Yahav].
• (CVE-2022-24735) By exploiting weaknesses in the Lua script execution
  environment, an attacker with access to Redis can inject Lua code that will
  execute with the (potentially higher) privileges of another Redis user.
  [reported by Aviv Yahav].

[DandyDeveloper]

This still definitely should be done. I'll try a basic upgrade using the latest Redis images and make sure everything seems functionally sound.