Officially support Python 3.12 and 3.13

**Describe the feature you'd like**

I'd like to see official guarantees that this Python package runs under Python 3.12 and 3.13, which were released on 2023-10-02 and 2024-10-07 respectively. I can only see support for Python 3.11 in [`pyproject.toml`](https://github.com/aws/sagemaker-python-sdk/blob/8a559adde94689590320203c41ac5a49cd17185e/pyproject.toml#L31).

**How would this feature be used? Please describe.**

Ensure I can move my own code to Python 3.12 and 3.13 and benefit from the features from these releases.

**Describe alternatives you've considered**

Using the sdk although it's not officially supported with Python 3.12 und 3.13 and YOLO. 😀

Start with the supported Python-version declaration in pyproject.toml at line 31, then inspect the repository's configuration for where compatibility is tested or guaranteed. Done means Python 3.12 and 3.13 are officially included and the package's compatibility checks pass under both versions.

Written by the indexing model from the issue text.