.Net: Update OTel GenAI operation names (#13334)

### Motivation and Context

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OTel GenAI operation names have the following updates:
1. `chat.completion` to `chat`
2. `text.completion` to `text_completion`

### Description

<!-- Describe your changes, the overall approach, the underlying design.
These notes will help understanding how your code works. Thanks! -->
This PR updates those operation names

### 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
- [ ] I didn't break anyone 😄

Author: TaoChenOSU

dotnet/src/InternalUtilities/src/Diagnostics/ModelDiagnostics.cs

@@ -53,7 +53,7 @@ internal static class ModelDiagnostics
             return null;
         }
 
-        const string OperationName = "text.completions";
+        const string OperationName = "text_completion";
         var activity = s_activitySource.StartActivityWithTags(
             $"{OperationName} {modelName}",
             [
@@ -105,7 +105,7 @@ internal static class ModelDiagnostics
             return null;
         }
 
-        const string OperationName = "chat.completions";
+        const string OperationName = "chat";
         var activity = s_activitySource.StartActivityWithTags(
             $"{OperationName} {modelName}",
             [

python/semantic_kernel/utils/telemetry/model_diagnostics/decorators.py

@@ -34,10 +34,8 @@
 MODEL_DIAGNOSTICS_SETTINGS = ModelDiagnosticSettings()
 
 # Operation names
-CHAT_COMPLETION_OPERATION = "chat.completions"
-CHAT_STREAMING_COMPLETION_OPERATION = "chat.streaming_completions"
-TEXT_COMPLETION_OPERATION = "text.completions"
-TEXT_STREAMING_COMPLETION_OPERATION = "text.streaming_completions"
+CHAT_COMPLETION_OPERATION = "chat"
+TEXT_COMPLETION_OPERATION = "text_completions"
 
 
 # We're recording multiple events for the chat history, some of them are emitted within (hundreds of)
@@ -174,7 +172,7 @@ async def wrapper_decorator(
 
             with use_span(
                 _get_completion_span(
-                    CHAT_STREAMING_COMPLETION_OPERATION,
+                    CHAT_COMPLETION_OPERATION,
                     completion_service.ai_model_id,
                     model_provider,
                     completion_service.service_url(),
@@ -288,7 +286,7 @@ async def wrapper_decorator(*args: Any, **kwargs: Any) -> AsyncGenerator[list["S
 
             with use_span(
                 _get_completion_span(
-                    TEXT_STREAMING_COMPLETION_OPERATION,
+                    TEXT_COMPLETION_OPERATION,
                     completion_service.ai_model_id,
                     model_provider,
                     completion_service.service_url(),

python/tests/integration/completions/test_text_completion.py

@@ -233,8 +233,8 @@ def services(self) -> dict[str, tuple[ServiceType | None, type[PromptExecutionSe
             ),
             "hf_summ": (
                 HuggingFaceTextCompletion(
-                    service_id="jotamunz/billsum_tiny_summarization",
-                    ai_model_id="jotamunz/billsum_tiny_summarization",
+                    service_id="Falconsai/text_summarization",
+                    ai_model_id="Falconsai/text_summarization",
                     task="summarization",
                 )
                 if hugging_face_setup

python/tests/unit/connectors/ai/hugging_face/test_hf_text_completions.py

@@ -23,7 +23,7 @@
             "translate English to Dutch: Hello, how are you?",
         ),
         (
-            "jotamunz/billsum_tiny_summarization",
+            "Falconsai/text_summarization",
             "summarization",
             """
         Summarize: Whales are fully aquatic, open-ocean animals:

python/tests/unit/utils/model_diagnostics/test_trace_streaming_chat_completion.py

@@ -16,7 +16,7 @@
 from semantic_kernel.exceptions.service_exceptions import ServiceResponseException
 from semantic_kernel.utils.telemetry.model_diagnostics import gen_ai_attributes
 from semantic_kernel.utils.telemetry.model_diagnostics.decorators import (
-    CHAT_STREAMING_COMPLETION_OPERATION,
+    CHAT_COMPLETION_OPERATION,
     ChatHistoryMessageTimestampFilter,
     trace_streaming_chat_completion,
 )
@@ -119,7 +119,7 @@ async def test_trace_streaming_chat_completion(
 
         # Before the call to the model
         mock_span.set_attributes.assert_called_with({
-            gen_ai_attributes.OPERATION: CHAT_STREAMING_COMPLETION_OPERATION,
+            gen_ai_attributes.OPERATION: CHAT_COMPLETION_OPERATION,
             gen_ai_attributes.SYSTEM: MockChatCompletion.MODEL_PROVIDER_NAME,
             gen_ai_attributes.MODEL: chat_completion.ai_model_id,
         })

python/tests/unit/utils/model_diagnostics/test_trace_streaming_text_completion.py

@@ -14,7 +14,7 @@
 from semantic_kernel.exceptions.service_exceptions import ServiceResponseException
 from semantic_kernel.utils.telemetry.model_diagnostics import gen_ai_attributes
 from semantic_kernel.utils.telemetry.model_diagnostics.decorators import (
-    TEXT_STREAMING_COMPLETION_OPERATION,
+    TEXT_COMPLETION_OPERATION,
     trace_streaming_text_completion,
 )
 from tests.unit.utils.model_diagnostics.conftest import MockTextCompletion
@@ -98,7 +98,7 @@ async def test_trace_streaming_text_completion(
 
         # Before the call to the model
         mock_span.set_attributes.assert_called_with({
-            gen_ai_attributes.OPERATION: TEXT_STREAMING_COMPLETION_OPERATION,
+            gen_ai_attributes.OPERATION: TEXT_COMPLETION_OPERATION,
             gen_ai_attributes.SYSTEM: MockTextCompletion.MODEL_PROVIDER_NAME,
             gen_ai_attributes.MODEL: text_completion.ai_model_id,
         })