Add clusterIP to service if specified in values

[EutiziStefano]

Proposed changes

If you need to specify a fixed clusterip, add it to the values and it will be used in the service manifest.

Opened issue: #4057

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• [ X] I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• [X ] I have updated necessary documentation
• I have rebased my branch onto main
• [X ] I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[vepatel]

@EutiziStefano would you like to make the suggested change?

[codecov]

Codecov Report

Merging #4058 (3c2e7ec) into main (5a6a3d2) will decrease coverage by 0.03%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4058      +/-   ##
==========================================
- Coverage   51.97%   51.95%   -0.03%     
==========================================
  Files          59       59              
  Lines       16762    16762              
==========================================
- Hits         8712     8708       -4     
- Misses       7753     7755       +2     
- Partials      297      299       +2     

see 1 file with indirect coverage changes

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[vepatel]

Thanks @lucacome