[App Clips] Add Associated Domains to App Clips

[danielebogo]

📘 Part of: #2549

Part of #2551

Based on Apple Documentation, we need to add and specify the Associated Domains to both the App and App Clips targets.

This PR adds:
• appclips:pocketcasts.com to the App entitlement
• appclips:pca.st, appclips:pcast.pocketcasts.net, appclips:pocketcasts.com to the AppClips entitlement

To test

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[mokagio]

I added the associated domains capability to the App Clip on the developer portal and regenerated the provisioning profiles.

On my end, Xcode shows no warnings in the Signing & Capabilities tag for the target

Notice the associated domains capability in the distribution provisioning profile.