docs: update & add new AWS DLCs (#2571)
* docs: update & add new AWS DLCs
* Remove legacy FAQ sections
* Update SGLang container URI to version 0.5.12 with new dependencies
* Remove outdated TEI container URI from the docs
* Update TEI container URIs to version 2.0.1-tei1.9.3 for CPU and GPU
* Enhance documentation for obtaining container URIs in SageMaker SDK
