Migrate cloudwatchevent* modules and tests (ansible-collections#1517)

Migrate cloudwatchevent* modules and tests

Depends-On: ansible-collections#1052
Remove cloudwatchevent* modules and tests
These modules have been migrated to amazon.aws
Update runtime.yml with redirects to that collection
Update ignore files

Reviewed-by: Mike Graves <[email protected]>
Reviewed-by: Mark Chappell <None>