Avoid the bootstrap of an `ApplicationModules` instance to execute `ApplicationModuleInitializer`s

[odrotbohm]

With the implementation of GH-1060 and GH-1062, we can execute ApplicationModuleInitializers solely based on the static metadata. We should tweak our runtime setup to verify whether the metadata file is present and rather use that in favor of using an ApplicationModules instance.

Related tickets

• Avoid dependency on JGraphT #1060
• Application metadata JSON should list ApplicationModuleInitializer beans #1062