Don't get the composition animation system involved in every property read

[kekekeks]

99.9% of our visuals aren't involved in composition animations, yet every single property read is reading from animation store dictionaries.

This PR:

• extracts animation-related code into a separate auxiliary class
• introduces a special step for updating effective animated values rather then trying to evaluate those on demand

So server object property reads are now simple field reads and are way faster

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0046515-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0046541-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0046559-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]