Added basic support for redis sentinel based on https://github.com/Namoshek/laravel-redis-sentinel

[Jacq]

Merged and refactor code with from old fork #https://github.com/ml65/prometheus_client_php that supports redis sentinel by updating master address/port options before redis connections.

[LKaemmerling]

Hey, thank you for your work. Would it be possible to add tests based on https://hub.docker.com/r/bitnami/redis-sentinel (see our https://github.com/PromPHP/prometheus_client_php/blob/main/.github/workflows/tests.yml)?

[Jacq]

Hey, thank you for your work. Would it be possible to add tests based on https://hub.docker.com/r/bitnami/redis-sentinel (see our https://github.com/PromPHP/prometheus_client_php/blob/main/.github/workflows/tests.yml)?

Already added some test and performed a full refactor based on a different repo, using phpredis sentinel support.
Still need to fix the Redis version matrix test

[Jacq]

Added tests, ready to merge.
It was tricky to include Redis sentinel service as redis5 does not support resolve hostname.