Async animation loading improvements #1122

Job	Run time
Build Example App	8m 21s
Build Package (13.2.1)	3m 43s
Build Package (13.4.1)	2m 36s
Build Package (14.2)	3m 8s
Build Package (14.3)	5m 1s
Build XCFramework	4m 21s
Test Carthage support	12m 14s
Lint CocoaPods podspec	5m 51s
Lint Embedded Libraries	45s
Test Swift Package Manager support	4m 52s
Lint Swift	1m 36s
Test Package	36m 50s
	1h 29m 18s

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