feat(DataGrid): make IDataGridCollectionViewFactory and IDataGridCollectionView, Add DP CollectionView

[workgroupengineering]

What does the pull request do?

Currently there is no way for the user collection to implement IDataGridCollectionViewFactory and to provide own implementation of IDataGridCollectionView. In fact, IDataGridCollectionViewFactory is not used at all.

It is needed to avoid the default implementation (DataGridCollectionView), which iterates over the whole collection and doesn't allow a user to implement data virtualization (to avoid keeping large amounts of data in memory).

Added DP CollectionView to allow sorting, grouping the DataGrid even when ItemsSource is not DataGridCollectionView

What is the current behavior?

What is the updated/expected behavior with this PR?

How was the solution implemented (if it's not obvious)?

Checklist

• Added unit tests (if possible)?
• Added XML documentation to any related classes?
• Consider submitting a PR to https://github.com/AvaloniaUI/avalonia-docs with user documentation

Breaking changes

Obsoletions / Deprecations

Fixed issues

Fixes #13650

[avaloniaui-bot]

You can test this PR using the following package version. 11.1.999-cibuild0045391-beta. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 11.1.999-cibuild0045393-beta. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]