Revert "Speed up first asset load by using the binary-formatted asset manifest for image resolution (#118782)" (#121220)

This reverts commit e3db0488.

Speed up first asset load by using the binary-formatted asset manifest for image resolution (#118782)

* add asset manifest bin loading and asset manifest api

* use new api for image resolution

* remove upfront smc data casting

* fix typecasting issue

* remove unused import

* fix tests

* lints

* lints

* fix import

* fix outdated type name

* restore AssetManifest docstrings

* update test

* update other test

* make error message for invalid keys more useful