feat: Implement runner label replacement functionality and add corresponding tests -> prod

[shubham-stepsecurity]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 86.90476% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.82%. Comparing base (2464ff7) to head (ca91a64).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
remediation/workflow/secureworkflow.go	55.00%	6 Missing and 3 partials ⚠️
remediation/workflow/runnerlabel/runnerlabel.go	96.87%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2564      +/-   ##
==========================================
+ Coverage   67.70%   68.82%   +1.11%     
==========================================
  Files          19       20       +1     
  Lines        1607     1687      +80     
==========================================
+ Hits         1088     1161      +73     
- Misses        398      402       +4     
- Partials      121      124       +3     

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