fix(feeds): Avoid boxing in CollectionAnalyzer

[dr1rrb]

Bugfix

Avoid boxing in CollectionAnalyzer

What is the current behavior?

Diff analyzer is working with object? which will box ValueType and requires us to have a specific path for them. Doing this we are also loosing the nullable annotions and prevents us to add helpers for tracking in ListFeed<T>

What is the new behavior?

We are using generic everywhere and using object? as T when we don't have type like for CollectionChangedEventArgs.

PR Checklist

• Tested code with current supported SDKs
• Docs have been added/updated which fit documentation template. (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Wasm UI Tests are not showing unexpected any differences. Validate PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Updated the Release Notes
• Associated with an issue (GitHub or internal)