Allow StartupProbe to be configured via helm

[vepatel]

Proposed changes

• Add startup probe to helm configuration,
• Add an ingress based example
• Docs: feat: adds helm docs for startup probe in NIC documentation#805

Checklist

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

• 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
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.95%. Comparing base (d5f9726) to head (cc2b574).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8011   +/-   ##
=======================================
  Coverage   52.95%   52.95%           
=======================================
  Files          90       90           
  Lines       21729    21729           
=======================================
  Hits        11506    11506           
  Misses       9746     9746           
  Partials      477      477           

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