Adding example for inference components and managed instance scaling for SageMaker real time hosting and inference (#275)

* Cleaned up notebooks

Cleaned up for initial push to staging

* removed references to goldfinch

* Updated readme

* moved to proper directory

* fixed session object reference

* Updated session variable

* Updated with logic to check store vars. Need to remove internal only code

* linted notebooks and added test header and footers

* Fixed prompt and parameters for codegen25

* Updated descriptions, added handling

* Removed custom model shapes

Author: jhp612