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

• Tests have been added/modified and all tests pass. : I did my e2e tests.
• Functionality/bugs have been confirmed to be unchanged or fixed.
• 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]

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 ⚠️

Additional details and impacted files

@@            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!