CodeArtifact login support for FrameworkProcessor Jobs

**Describe the feature you'd like**
We use private Python packages hosted in CodeArtifact for some of our common preprocessing and training code. However, currently there is no way to have a processing job authenticate to CodeArtifact before it installs Python requirements from a `requirements.txt` file.

Currently, we get an authorization token from CodeArtifact, write it to a file, and include that file with our processing/training code that gets pushed to S3 and pulled down in the jobs. This is really just a cleaner way to implement the same thing.

**How would this feature be used? Please describe.**
The simplest way to implement this would be to borrow code from the [sagemaker-training-toolkit](https://github.com/aws/sagemaker-training-toolkit/blob/master/src/sagemaker_training/modules.py#L186-L235) package to parse a CodeArtifact repo URL from a CodeArtifact repo ARN, and then simply write this token as an index into the `runproc.sh` file that gets generated in the [_generate_framework_script()](https://github.com/akuma12/sagemaker-python-sdk/blob/master/src/sagemaker/processing.py#L1830-L1864) method of the FrameworkProcessor class.

Adding an optional `codeartifact_repo_arn` parameter to the `.run()` method would allow it to be passed to the `_generate_framework_script()` method.

Commencez par src/sagemaker/processing.py, en particulier FrameworkProcessor.run() et _generate_framework_script(), puis comparez l’analyse de l’URL CodeArtifact dans sagemaker-training-toolkit modules.py. Suivez la manière dont runproc.sh installe requirements.txt. Le travail est terminé lorsqu’un ARN de dépôt facultatif peut être transmis et que le job généré s’authentifie auprès de CodeArtifact avant d’installer les paquets privés.

Rédigé par le modèle d'indexation à partir du texte de l'issue.