ci(frontend,backend): minor fixes in workflow files

[aadil96]

No description provided.

[what-the-diff]

PR Summary

• Improved Backend Testing Workflow
  • Corrected the reference link in the frontend workflow for smoother operations.
  • Simplified the testing process by eliminating unnecessary steps.
  • Adjusted the target of the coverage report for precision to src/backend.
• Improved Frontend Testing Workflow
  • Adjusted the reference link from backend to frontend.
  • Mapped the paths-filter to include frontend-specific directories, providing a more targeted approach.
  • Removed needless steps from the test running process, enhancing efficiency.
  • Updated the target of coverage report to src/frontend for more accurate tracking.
  • Provided more clarity by renaming the coverage report artifact to frontend-coverage-report.
  • Redefined the header for the pull request comment to frontend-test-coverage, providing more specificity.

[github-actions]

Package	Line Rate	Complexity	Health
.	99%	0	✔
Summary	99% (136 / 138)	0	✔