[AutoRelease] t2-containerservice-2025-12-05-50355(can only be merged by SDK owner)

[azure-sdk]

https://github.com/Azure/sdk-release-request/issues/6775
Recording test success
https://dev.azure.com/azure-sdk/internal/_build?definitionId=982
BuildTargetingString
azure-mgmt-containerservice
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[Copilot]

Pull request overview

This is an automated release PR for the azure-mgmt-containerservice package that updates from API version 2025-10-01 (stable) to 2025-10-02-preview (preview). The package transitions from Production/Stable status to Beta, with the version bumped from 40.2.0 to 41.0.0b3.

Key changes:

• API version update across all tests and samples from 2025-10-01 to 2025-10-02-preview
• Package status changed from stable to beta (development status downgrade)
• Dependency change: msrest>=0.7.1 replaced with isodate>=0.6.1
• New test methods and parameters added for new API features (guardrails, safeguards, load balancer rebalancing, machine create/update operations)
• Extensive additions to test parameters reflecting new API surface area

Reviewed changes

Copilot reviewed 233 out of 234 changed files in this pull request and generated no comments.

File	Description
pyproject.toml	Updated package metadata: changed development status to Beta, replaced msrest dependency with isodate, set is_stable to false
_version.py	Version bump from 40.2.0 to 41.0.0b3 (beta release)
generated_tests/*.py	Updated API versions and added new test methods/parameters for expanded API features
generated_samples/*.py	Updated API version references in comments, added new sample files for new features, corrected resource ID casing