Remove dead test code

[akx]

Description

This PR removes test code that has been disabled in:

• [AutoPR] consumption/resource-manager #2158 (2019)
• [AutoPR mediaservices/resource-manager] Adding Media services 2018 03 30 preview version #2418 (2018)
• [AutoPR] eventgrid/resource-manager #3959 (2019)
• [T2]ServiceBus #13175 (2020)
• Remove deprecated test classes #33400 (2023)

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
  • Removing code that is never run is unlikely to break things.
• CHANGELOG is updated for new features, bug fixes or other significant changes.
  • I don't think changelogs need to be updated here?
• 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.
  • Test coverage over test files will improve with this. :)

[github-actions]

Thank you for your contribution @akx! We will review the pull request and get back to you soon.

[Copilot]

Pull request overview

This PR removes disabled test files that have been inactive since 2018-2023. All files are clearly marked as disabled through either disable_ filename prefixes, @unittest.skip/@pytest.mark.skip decorators, or raise unittest.SkipTest() statements at module level.

Changes:

• Removes 8 disabled test files from the Service Bus management SDK
• Removes 1 disabled test file from Resource Graph SDK
• Removes 1 disabled test file from Media Services SDK
• Removes 1 disabled test file from Event Grid SDK
• Removes 1 disabled test file from Consumption SDK

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_cli_mgmt_servicebus_namespace.py	Removed disabled namespace tests with @unittest.skip decorators
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_cli_mgmt_servicebus.py	Removed disabled CLI management tests with disable_ prefix
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_azure_mgmt_servicebus_topic_subscription_rule.py	Removed disabled topic subscription rule tests with disable_ prefix
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_azure_mgmt_servicebus_topic_subscription.py	Removed disabled topic subscription tests with disable_ prefix
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_azure_mgmt_servicebus_topic.py	Removed disabled topic tests with disable_ prefix
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_azure_mgmt_servicebus_queue.py	Removed disabled queue tests with disable_ prefix
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_azure_mgmt_servicebus_namespace.py	Removed disabled namespace tests with disable_ prefix
sdk/servicebus/azure-mgmt-servicebus/tests/disable_test_azure_mgmt_servicebus_check_name_availability.py	Removed disabled name availability check tests with disable_ prefix
sdk/resources/azure-mgmt-resourcegraph/tests/test_mgmt_resourcegraph.py	Removed resource graph tests skipped with @pytest.mark.skip
sdk/media/azure-mgmt-media/tests/test_mgmt_media.py	Removed media tests with raise unittest.SkipTest
sdk/eventgrid/azure-mgmt-eventgrid/tests/test_azure_mgmt_eventgrid_test.py	Removed event grid tests with raise unittest.SkipTest
sdk/consumption/azure-mgmt-consumption/tests/test_mgmt_consumption.py	Removed consumption tests with raise unittest.SkipTest