[MPG] Generate diff of generated SDK between swagger and typespec

[msyyc]

MPG generate diff for azure-mgmt-sphere: https://apiview.dev/Assemblies/Review/f48fd53f674c4657a064361ee8dd0859?revisionId=c635cb1ae6ee4ef991528b33ea20042c&diffOnly=False&doc=False&diffRevisionId=880ae55cfe1742649ef8f9ddf4cda63b

Python specific

• model flatten unsupported: [MPG] Backward compat access to "properties" flattening (basic scenario) #2187
• import about HttpRequest/HttpResponse changes from azure.core.pipeline.transport to azure.core.rest
• expose send_request for client (API change)
• expose new kwargs stream (API change): parameters in docstring but not in method signature #2363
• hide maxpagesize (API change)
• [MPG][Diff] unused model ArmOperationStatus of SDK generated from typespec #2584
• [MPG][Diff] model OperationListResult is renamed to PagedOperation and not used #2585
• [MPG][Diff] SDK from Typespec still generate model when model defines no property #2586
• [MPG][Diff] type changed from model type to JSON for _xxx_initial operation #2597
• [MPG][Diff] default value in Typespec, Swagger and SDK azure-sdk-for-python#35759
• [MPG][Diff] all header and query signatures changes from positional to keyword-only #2612

across language

• lro operation are not recognized (across language, need TCGC optimize)
• AzureSphereMgmtClient -> AzureSphereClient (could be renamed in client.tsp)
• model Resource is renamed to ArmResource (same for ProxyResource and TrackedResource): resource model changes of generated SDK code based on TSP compared with swagger typespec-azure#104
• model ArmResource lacks property name. (Maybe fixed by https://github.com/Azure/typespec-azure/pull/736/files#diff-823f10c1812ffa803f58da35c7d41623a79c2e5c37f0c15d09ce66bcfdcfbe97 but need check)
• properties of SystemData is marked as readonly: [MPG][Diff] properties of SystemData is marked as readonly #2553
• Swagger emitter makes up new name for the same model with different schemas: Swagger emitter makes up new name for the same model with different schemas typespec-azure#688
• New model UserAssignedIdentities will cause breaking changes for SDK: [TCGC] [ARM] Expected client code on definition model UserAssignedIdentities is Record<UserAssignedIdentity>;  typespec-azure#825 and [Bug]: New model UserAssignedIdentities will cause breaking changes for SDK typespec-azure#824

issue

• wrong return type for LRO delete of generated SDK with TypeSpec #2531

[msyyc]

azure-mgmt-deviceregistry: Azure/azure-sdk-for-python#35264