feat: exporter connect to redis with TLS URI

[wkd-woo]

Description

$kubectl get pod/redis-replication-0 -o yaml

...
    - name: REDIS_ADDR
      value: rediss://localhost:6379
    - name: REDIS_EXPORTER_SKIP_TLS_VERIFICATION
      value: "true"
    - name: REDIS_EXPORTER_TLS_CA_CERT_FILE
      value: /tls/ca.crt
    - name: REDIS_EXPORTER_TLS_CLIENT_CERT_FILE
      value: /tls/tls.crt
    - name: REDIS_EXPORTER_TLS_CLIENT_KEY_FILE
      value: /tls/tls.key
...

In order for the TLS-applied redis-server and exporter to communicate, the URI to which the exporter accesses the redis-server must be changed.

redis://<REDIS-SERVER> -> rediss://<REDIS-SERVER>

This is what redis exporter README description describes. Please refer to below.

https://github.com/oliver006/redis_exporter?tab=readme-ov-file#command-line-flags

@shubham-cmyk @drivebyer Please consider merging these pull requests, thank you always.

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• [x] Tests have been added/modified and all tests pass. : I did my e2e tests.
• [x] Functionality/bugs have been confirmed to be unchanged or fixed.
• [x] I have performed a self-review of my own code.
• [ ] Documentation has been updated or added where necessary.

Additional Context

After I added this feature, the exporter can connect to TLS-enabled redis-server and makes metrics.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 39.93%. Comparing base (d121d86) to head (d605650). Report is 35 commits behind head on master.

Files	Patch %	Lines
k8sutils/statefulset.go	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #902 +/- ## ========================================== + Coverage 35.20% 39.93% +4.73% ========================================== Files 19 19 Lines 3213 2662 -551 ========================================== - Hits 1131 1063 -68 + Misses 2015 1528 -487 - Partials 67 71 +4 ```

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[drivebyer]

nice!