[amplify_analytics_pinpoint] AGP 9 incompatibility — kotlin-android plugin must be removed

[asaarnak]

See same problem with solution in firebase plugins: firebase/flutterfire#17987

A problem occurred evaluating project ':amplify_analytics_pinpoint'.
> Failed to apply plugin 'kotlin-android'.
   > Cannot add extension with name 'kotlin', as there is an extension already registered with that name.

[ekjotmultani]

@asaarnak thanks for raising this, will get it fixed