fix: ensure jq is installed and add coverage generation in GitHub Actions

[byte-msft]

Description

This PR addresses two issues:

1. Ensuring that jq is installed before using it in the Makefile.
2. Adding a make coverage step in the GitHub Actions workflow to generate coverage files prior to uploading artifacts.

Related Issue

#688
ci: minor bugs in "Test Retina Image" pipeline

Checklist

• I have read the contributing documentation.
• I signed and signed-off the commits (git commit -S -s ...). See this documentation on signing commits.
• I have correctly attributed the author(s) of the code.
• I have tested the changes locally.
• I have followed the project's style guidelines.
• I have updated the documentation, if necessary.
• I have added tests, if applicable.

Screenshots (if applicable) or Testing Completed

Please add any relevant screenshots or GIFs to showcase the changes made.

Additional Notes

Changes

• Add a check in the Makefile to fail early if jq is not found on the system.
• Update the GitHub Actions workflow to run make coverage before the coverage artifacts are uploaded.

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[byte-msft]

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