Add alpha specific app groups

[graeme]

Task/Issue URL: https://app.asana.com/0/0/1205332058642473/f

Description:

This is needed to fix a potential problem when running the prod + Alpha builds side by side. If we don’t separate the app groups, we would end up sharing state between the two which could introduce problems when we change schema between releases.

Steps to test this PR:

1. Check out the branch
2. Go to the Project view, select target from DuckDuckGo, WidgetsExtension and PacketTunnelProvider, select Signing & Capabilities for each and, in their Alpha config ensure that you have the Provisioning Profiles downloaded.
3. If step 2 fails, open the Terminal, make sure you’re in the iOS repo, and run bundle exec fastlane sync_signing_alpha then repeat step 2.
4. Go to Schemes and change the Archive setting to build the Alpha
5. Generate an Archive (Product → Archive)
6. When the Organizer shows (or, if it doesn’t, but the build succeeded, open it manually) select the most recent archive and hit Validate App. Note: you are not going to complete this flow!!
7. Go through the whole flow (selecting profiles along the way).
8. Once you get to the final Summary stage, there will be a list of app groups. Make sure they all have the format group.com.duckduckgo.alpha.*

Copy Testing:

• Use of correct apostrophes in new copy, ie ’ rather than '

Orientation Testing:

• Portrait
• Landscape

Device Testing:

• iPhone SE (1st Gen)
• iPhone 8
• iPhone X
• iPhone 14 Pro
• iPad

OS Testing:

• iOS 14
• iOS 15
• iOS 16

Theme Testing:

• Light theme
• Dark theme

---

Internal references:

Software Engineering Expectations
Technical Design Template

[samsymons]

LGTM, testing steps worked as expected, and I'm still able to build the regular app for both debug and release. App groups look good!