Python: updated onnx deps (#12251)

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Updated onnx dependencies, since it now supports both python 3.13 and
all platforms.

### Description

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These notes will help understanding how your code works. Thanks! -->

### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [x] The code builds clean without any errors or warnings
- [x] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [x] All unit tests pass, and I have added new tests where possible
- [x] I didn't break anyone 😄

Author: eavanvalkenburg

python/pyproject.toml

@@ -117,8 +117,7 @@ ollama = [
     "ollama ~= 0.4"
 ]
 onnx = [
-    "onnxruntime-genai ~= 0.5; python_version < '3.13' and platform_system != 'Windows'",
-    "onnxruntime == 1.22.0; platform_system == 'Windows'"
+    "onnxruntime-genai ~= 0.7"
 ]
 pandas = [
     "pandas ~= 2.2"

python/tests/unit/connectors/ai/onnx/services/test_onnx_chat_completion.py

@@ -11,15 +11,6 @@
 from semantic_kernel.kernel import Kernel
 from tests.unit.connectors.ai.onnx.conftest import gen_ai_config, gen_ai_config_vision
 
-try:
-    import onnxruntime_genai  # noqa: F401
-
-    ready = True
-except ImportError:
-    ready = False
-
-pytestmark = pytest.mark.skipif(not ready, reason="ONNX Runtime is not installed.")
-
 
 @patch("builtins.open", new_callable=mock_open, read_data=json.dumps(gen_ai_config))
 @patch("onnxruntime_genai.Model")

python/tests/unit/connectors/ai/onnx/services/test_onnx_text_completion.py

@@ -4,23 +4,11 @@
 
 import pytest
 
-from semantic_kernel.connectors.ai.onnx import (  # noqa: E402
-    OnnxGenAIPromptExecutionSettings,
-    OnnxGenAITextCompletion,
-)
+from semantic_kernel.connectors.ai.onnx import OnnxGenAIPromptExecutionSettings, OnnxGenAITextCompletion  # noqa: E402
 from semantic_kernel.contents import TextContent
 from semantic_kernel.exceptions import ServiceInitializationError
 from tests.unit.connectors.ai.onnx.conftest import gen_ai_config
 
-try:
-    import onnxruntime_genai  # noqa: F401
-
-    ready = True
-except ImportError:
-    ready = False
-
-pytestmark = pytest.mark.skipif(not ready, reason="ONNX Runtime is not installed.")
-
 
 @patch("builtins.open", new_callable=mock_open, read_data=json.dumps(gen_ai_config))
 @patch("onnxruntime_genai.Model")

python/tests/unit/connectors/ai/onnx/services/test_onnx_utils.py

@@ -1,10 +1,6 @@
 # Copyright (c) Microsoft. All rights reserved.
-from semantic_kernel.connectors.ai.onnx.utils import (
-    gemma_template,
-    llama_template,
-    phi3_template,
-    phi3v_template,
-)
+
+from semantic_kernel.connectors.ai.onnx.utils import gemma_template, llama_template, phi3_template, phi3v_template
 from semantic_kernel.contents import AuthorRole, ChatHistory, ImageContent, TextContent