Jetpack settings page: Removing defaultProps from SearchableModules component

[coder-karen]

Fixes #38539

Proposed changes:

• This PR removes the defaultProps and propTypes from the SearchableModules component, adding defaults to the one property when defining that property.
• This prevents a console warning - Warning: Connect(SettingsForm): Support for defaultProps will be removed from memo components in a future major release. Use JavaScript default parameters instead - due to the legacy usage of defaultProps.
• Ultimately the issue was that the SearchableModules component was a function component, despite wrapping a class, so the defaultProps usage was missed on an earlier sweep of function component defaultProps usage.

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

#38539

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

No.

Testing instructions:

To replicate the issue:

• First make sure you have script debug enabled (define ( 'SCRIPT_DEBUG, 'true'); in wp-config.php)
• Then, testing locally on trunk or using a Jurassic Ninja site and the Beta tester plugin using bleeding edge Jetpack, visit the settings page - /wp-admin/admin.php?page=jetpack#/settings.
• You should see the above console error.

To test the fix:

• Apply this PR, and visit the settings page again. The console warning should be gone. The search function should work as it did before.

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the fix/defaultprops-connect-settings-form-warnings branch.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack fix/defaultprops-connect-settings-form-warnings
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

When contributing to Jetpack, we have a few suggestions that can help us test and review your patch:

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[anomiex]

Looks reasonable.