[Update] Firebase for iOS v8.2.0

[dmariogatto]

Previous PRs: #485, #479

Includes

Firebase

• All projects updated 8.2.0
• MLKit for Firebase packages deprecated/removed (no longer supported)
  • Firebase.MLKit
  • Firebase.MLKit.Common
  • Firebase.MLKit.ModelInterpreter
  • Firebase.MLKit.NaturalLanguage
  • Firebase.MLKit.Vision
  • Note: probably need a new project/repo for the newer Google ML Kit bindings
• Added beta binding for Firebase App Distribution (Firebase.AppDistribution) & App Check (Firebase.AppCheck)
  • excluded for now (no sample or testing done)
• Minimum iOS version increased to 10.0

Google

• AdMob updated to 8.6.0
• Google Cast updated to 4.6.1
• Google Maps & Places updated to 5.0.0
• Google Tag Manager updated to 7.3.1
• Deprecated/removed packages (due to outdated Firebase dependencies),
  • Google.AppIndexing
  • Google.Core
  • Google.InstanceID
  • Firebase.InstanceID
• Minimum iOS version increased to 10.0 (due to Firebase dependencies)

Notes

Removed the Wrap methods/properties that where marked as Obsolete (seems like a major version bump is the time to do it 😅).

Added a new build property that can be used to link Firebase with Ad Id support.

<PropertyGroup>
  <FirebaseWithoutAdIdSupport>True</FirebaseWithoutAdIdSupport>
</PropertyGroup>

There were quite a few binding changes, so would definitely appreciate someone to look them over. All the samples do run & link as far as I can tell.

UMP has been separated out from AdMob (Google.UserMessagingPlatform).

Any issues let me know!

[dmariogatto]

Now obsolete, see #494