Promote kms_key* modules and tests (ansible-collections#1520)

Promote kms_key* modules and tests

SUMMARY


Remove kms_key* modules and tests
These modules have been migrated to amazon.aws
Update runtime.yml with redirects to that collection
Update ignore files
ISSUE TYPE


Bugfix Pull Request
Docs Pull Request
Feature Pull Request
New Module Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

Reviewed-by: Mark Chappell <None>