Dropping support for Python 3.7 and 3.8 for azure-ai-ml

[saanikaguptamicrosoft]

Description

For Azure SDK, 3.9 and later is supported:

Complying with the same for azure-ai-ml sdk package.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR drops support for Python 3.7 and 3.8 for the azure-ai-ml package, aligning with Azure SDK's policy of supporting Python 3.9 and later. The changes update the package classifiers in setup.py and document the change in the CHANGELOG.

Key Changes

• Removed Python 3.7 and 3.8 from the programming language classifiers in setup.py
• Added a CHANGELOG entry documenting the dropped support

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
sdk/ml/azure-ai-ml/setup.py	Removed Python 3.7 and 3.8 from the classifier list to reflect dropped version support
sdk/ml/azure-ai-ml/CHANGELOG.md	Added entry in "Other Changes" section documenting the removal of Python 3.7 and 3.8 support

[saanikaguptamicrosoft]

/check-enforcer evaluate

[saanikaguptamicrosoft]

/check-enforcer evaluate