Make "New features to boost your workflow" section optional via codecov.yml

[Kobby-Bawuah]

What product do you want to improve? Uploader / PR Comment Generation (Codecov Worker)

Is your feature request related to a problem? Please describe. Currently, the "New features to boost your workflow" section is automatically included in pull request (PR) comments generated by Codecov. Some users find this section not useful or distracting. There is no option available in the codecov.yml configuration to disable or hide this section, which causes frustration for users who prefer clean and minimal PR comments.

Describe the solution you'd like Introduce a new configuration option in the codecov.yml file (e.g., comment.disable_cross_pollination_section: true) that allows users to disable the "New features to boost your workflow" section in PR comments.

Describe alternatives you've considered Currently, the only alternative is a backend manual toggle via feature flags, but it requires support team intervention and does not allow users to control this behavior independently. Making it configurable through the codecov.yml would empower users directly.

Additional context A temporary feature flag was introduced through this PR allowing manual toggling by the support team.