[Mgmt] Check validation for Python Mgmt SDK generated from typespec which is converted from swagger

[msyyc]

• [TSP Migration] Migrate heathbot from swagger to TypeSpec azure-rest-api-specs#34069
• [TSP Migration][hardwaresecuritymodules] TypeSpec migrated from swagger azure-rest-api-specs#34278 (578d77b)
• Migrate Confluent from swagger to TypeSpec azure-rest-api-specs#34671 (fad479c)
• [TSP Migration]--storagemover azure-rest-api-specs#35067
• [TSP Migration] Convert ElasticSan to TypeSpec azure-rest-api-specs#34078 (https://github.com/msyyc/azure-sdk-for-python/commits/elasticsan-migration/)
• [TSP Migration][hybridkubernetes] TypeSpec migrated from swagger azure-rest-api-specs#34074
• Convert Notificationhubs Swagger to Tsp azure-rest-api-specs#34320
• [TSP Migration][privatedns] TypeSpec migrated from swagger azure-rest-api-specs#34736 (https://github.com/msyyc/azure-sdk-for-python/tree/privatedns-migration/sdk/network/azure-mgmt-privatedns)
• Convert Sql VirtualMachine swagger to Tsp azure-rest-api-specs#34268 (https://github.com/msyyc/azure-sdk-for-python/commits/sqlvirtualmachine-migration/)
• [TSP Migration]--powerbidedicated azure-rest-api-specs#34282 (https://github.com/msyyc/azure-sdk-for-python/commits/powerbidedicated-migration/)
• [TSP Migration]--deviceprovisioningservices azure-rest-api-specs#34318 (https://github.com/msyyc/azure-sdk-for-python/commits/othubprovisioningservices-migration/)
• [TSP Migration][dns] TypeSpec migrated from swagger azure-rest-api-specs#34680
• [TSP Migration][edgeorder] TypeSpec migrated from swagger azure-rest-api-specs#34238
• [TSP Migration]--recoveryservices azure-rest-api-specs#34323 (https://github.com/msyyc/azure-sdk-for-python/commits/recoveryservices-migration/)
• [TSP Migration]--datadog azure-rest-api-specs#34281
• [TSP Migration][maintenance] TypeSpec migrated from swagger azure-rest-api-specs#34496
• [TSP Migration]--elastic azure-rest-api-specs#34324 (https://github.com/msyyc/azure-sdk-for-python/commits/elastic-migration/)
• [TSP Migration][redis] TypeSpec migrated from swagger azure-rest-api-specs#35243
• Convert Servicelinker Swagger to Tsp azure-rest-api-specs#34326 (https://github.com/msyyc/azure-sdk-for-python/commits/servicelinker-migration/)
• Convert Webpubsub Swagger to Tsp azure-rest-api-specs#35228
• [DevTestLabs] Convert existing OpenAPI spec to TypeSpec spec azure-rest-api-specs#35346 (https://github.com/Azure/azure-sdk-for-python/commits/devtestlabs-migration/)

[msyyc]

Breaking Changes

• query/header signatures are changed from positional to keyword-only: old swagger sdk and new typespec sdk
• single-level flatten. NOTE: Although there is API changes, python sdk model could be fully compatible for single-level flatten.
• nested-level flatten.
• model function as_dict output. NOTE: we plane to add helper function as_attr_syntax_dict in azure-core. (for more info, please see here)
• attribute additional_properties is removed from model
• model method serialize() and deserialize() are removed
• model string output matches REST API. (for more info, please see here)

Potential breaking changes:

• no final-stat-via in lro_options: old swagger sdk and new typespec sdk

[msyyc]

Other Changes

Common Types

• in old swagger, NodeType extends from self-defined ManagedProxyResource. After migrate to typesec, NodeType of the generated swagger extends from common-types ProxyResource. Here is generated SDK: old and new. NOTE: Although there is change about inheritance, it shall not be breakings for python.

[msyyc]

Potential codegen bug:

• [python][bug] unused model is exposed microsoft/typespec#7841