Fixes#1300.
## Summary
Updates Alamofire to 5.x and updates how we do authentication adapting and failure retrying.
## Screenshots
n/a
## Link to pull request in Documentation repository
n/a
## Any other notes
- Switches to using `AuthenticationInterceptor` to handle authenticated requests. This has a lot of good things: it's heavily tested, it only executes the refresh one at a time, and it has explicit handling of "this request failed with an _old_ access token" which is the root cause of some logouts in #1300.
- Switches from manually doing retries and backoffs to using `RetryPolicy` which also adds in retries for 5xx errors in addition to all of the URLError-specific logic that it has.
- Updates the apparently-copied-from-`AlamofireObjectMapper` repository for 5.x and removes some old Sodium-based handling that is now part of the Webhook flow, which is separate from Alamofire.
- Combines all .entitlements into either: App-iOS, App-catalyst, WatchApp, Extension-iOS or Extension-catalyst.
- Cleans up and renames all the schemes to match target names
- Moves around several folders and deletes some old files.
- Converts Podfile to be hierarchical, rather than calling shared methods.
- Always runs MaterialDesignIcons script; aborts early if it's up-to-date.
- Updates all dependencies.
