Standalone Initialization of all AWS Clients

[driverpt]

Type: Feature

Is your feature request related to a problem? Please describe.
We are using simple AWS Clients for most AWS Services and we just wanted simple initialization via properties of the clients, not the remainder of infrastructure

Describe the solution you'd like
Being able to add spring-cloud-aws-starter-autoconfigure and Automatically expose all clients. Similar to what happens in Micronaut AWS

Describe alternatives you've considered
Manually Instantiate all clients.

Additional context
N/A

[driverpt]

Superseeds #768

[MatejNedic]

Hey @driverpt ,
Thanks on opening issue, PR is welcome if you are up for it!