Python: [Breaking] Upgrade to azure-ai-projects 2.0+ (#4536)

* Prepare azure-ai-projects 2.0 GA compatibility

Add allow_preview support for internal AIProjectClient creation, keep backward compatibility for renamed SDK model classes, and align Azure AI/core paths and tests for GA validation workflows.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* upgrade to ai-project==2.0.0

* Python: remove azure-ai-projects keyword-guard paths

Assume azure-ai-projects 2.0+ in Azure AI client/provider/responses code paths by removing _supports_keyword_argument gating and related fallback branching.

Also fix pyright typing in FoundryMemoryProvider memory store calls by using ResponseInputItemParam-typed items.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* check fixes

* Python: remove unsupported foundry_features option

Drop foundry_features from Azure AI client and provider surfaces because azure-ai-projects 2.0.0 does not expose that create_version parameter.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Python: add allow_preview to Foundry memory provider

Propagate allow_preview when FoundryMemoryProvider constructs an AIProjectClient and update tests accordingly.

Also finish wiring allow_preview through AzureAIClient-facing surfaces and related docs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* aligning docstrings

* udpated lock

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/packages/core/pyproject.toml

@@ -34,7 +34,7 @@ dependencies = [
     # connectors and functions
     "openai>=1.99.0",
     "azure-identity>=1,<2",
-    "azure-ai-projects == 2.0.0b4",
+    "azure-ai-projects>=2.0.0,<3.0",
     "mcp[ws]>=1.24.0,<2",
     "packaging>=24.1",
 ]