Trim coverage report

[JustinKuli]

It's not clear why, but in the action run, the coverage report included a lot of dependencies. This grep might work.

[github-actions]

PR Review

⏱️ Estimated effort to review [1-5]	2, because the changes are limited to a specific workflow file and involve straightforward additions to filter and handle coverage reports. The logic is simple and the impact is confined to CI/CD pipeline behavior.
🏅 Score	85
🧪 Relevant tests	No
🔍 Possible issues	Possible Issue: The grep command is hardcoded to filter 'governance-policy-nucleus', which might not be flexible or applicable if the project structure or naming conventions change in the future.
🔒 Security concerns	No

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[github-actions]

Suggestion: It's recommended to use a more robust approach when filtering coverage data to avoid potential issues with filenames that could unintentionally match the grep pattern. Using a more specific pattern or a different method to identify the relevant sections of the coverage report could improve the reliability of the script. [enhancement]

Suggested change

	- run: |
	head -1 cover.out > nucleus_cover.out
	grep 'governance-policy-nucleus' cover.out >> nucleus_cover.out
	go tool cover -func=nucleus_cover.out
	- run: |
	head -1 cover.out > nucleus_cover.out
	grep '^governance-policy-nucleus ' cover.out >> nucleus_cover.out
	go tool cover -func=nucleus_cover.out