fix: remove old redis command from ddev-redis-7, fixes #46

[tyler36]

The Issue

• duplicate 'redis' alias after migrating from ddev-redis-7 #46

How This PR Solves The Issue

This PR attempts to remove the redis command if it is ownded by DDEV.

Manual Testing Instructions

1. Create new project

ddev config

2. Add ddev-redis-7

ddev addon get ddev/ddev-redis-7

3. Restart DDEV

ddev restart

4. Migrate to ddev-redis

ddev dotenv set .ddev/.env.redis --redis-optimized=true
ddev add-on get https://github.com/ddev/ddev-redis/tarball/refs/pull/47/head
ddev restart

5. Run DDEV command and confirm Command 'redis-cli' cannot have alias does NOT appear.

$ ddev -v   
ddev version v1.24.4

Automated Testing Overview

Release/Deployment Notes

[stasadev]

Thank you!

I have to admit, I didn't test the actual migration from ddev-redis-7 to ddev-redis.

This PR solves the problem with alias.