Hook up Amazon Pay configuration

[hsingyuc]

Fixes #3917

Changes proposed in this Pull Request:

This PR hooks up Amazon Pay configuration settings to the admin Stripe Amazon Pay settings that check for payment-enabled/disabled.

Screen.Recording.2025-03-13.at.3.00.23.PM.mov

Testing instructions

1. Turn the feature flag on, by setting the _wcstripe_feature_amazon_pay option to yes
2. Verify that Amazon Pay is now available in Stripe settings
3. Disable the Amazon Pay setting from admin payment settings
4. The Amazon Pay setting for the merchant copy configuration in the Stripe dashboard should be disabled
5. Turn on Amazon Pay in Stripe
6. The Amazon Pay setting in admin should be enabled

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• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

Changelog entry

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Changelog Entry Comment

Hook up payment methods configuration

Post merge

• Added testing instructions to the Release Testing Instructions wiki page (or does not apply)
• Added the needs docs label (or does not apply)
• Included this PR in the Release Thread scope (or does not apply)

[hsingyuc]

I'm closing this PR in favor of #4091.