Boost: Allow control over whether a module should run or not

[dilirity]

Fixes HOG-206

Proposed changes:

• Add WP filter (jetpack_boost_can_module_run) to allow developers more control over which module should run its functionality (useful for local development).

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

HOG-206

Does this pull request change what data or activity we track or use?

no

Testing instructions:

Test that everything still works

• Setup this on a jurassic ninja and make sure it works as expected. Test both free and premium and make sure that all features work;

Test the filter

• Setup this locally and make sure it's connected to your local Boost Cloud instance;
• Add this snippet to force modules to run their functionality:

add_filter( 'jetpack_boost_can_module_run', '__return_true' );

• Or use this boost developer PR - https://github.com/Automattic/boost-developer/pull/42;
• Make sure LCP, Cloud CSS work.
• You can also remove the snippet and features should stop working (LCP wouldn't optimize, Cloud CSS wouldn't print its CSS).

[github-actions]

Thank you for your PR!

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Boost plugin:

No scheduled milestone found for this plugin.

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[jp-launch-control]

Code Coverage Summary

Coverage changed in 1 file.

File	Coverage	Δ%	Δ Uncovered
projects/plugins/boost/app/modules/class-modules-setup.php	0/111 (0.00%)	0.00%	1 ❤️‍🩹

Full summary · PHP report · JS report

_{Coverage check overridden by I don't care about code coverage for this PR Use this label to ignore the check for insufficient code coveage. .}