fix(donate): override defaults with manual config

[dkoo]

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• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
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Changes proposed in this Pull Request:

In the Donate block, if manually configured the manual settings don't fully override the default settings in the Reader Revenue wizard as you would expect. If a frequency is disabled in Reader Revenue, that frequency will remain disabled in a manually configured block, even if that frequency is manually enabled.

This branch tweaks the logic so that if a block is manually configured, its manual settings completely override the settings in Reader Revenue.

Also overrides the default frequency if the manual setting differs from the default settings.

Closes /0/1200550061930446/1203385734865005.

How to test the changes in this Pull Request:

1. Toggle off the One-Time option in Reader Revenue → Donations. Keep Monthly and Annual enabled.
2. Create a new page. Add the Donate Block.
3. Toggle on the option to Configure Manually.
4. Enable One-Time in block settings, and disable Monthly.
5. Note that the one-time option does appear in the editor.
6. Publish the page.
7. Notice that the One-time option isn't available on the front-end.
8. Check out this branch, refresh. Confirm that the One-Time and Annual tabs are available (only those configured in manual settings).
9. In block settings, set the default frequency to something other than it is in Reader Revenue.
10. Confirm on the front-end that the default frequency matches the manual setting, not the Reader Revenue setting.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

[matticbot]

🎉 This PR is included in version 1.59.1-alpha.1 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[matticbot]

🎉 This PR is included in version 1.59.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀