build: format codebase imports using ruff linter (#1028)

# What does this PR do?

- Configured ruff linter to automatically fix import sorting issues.
- Set --exit-non-zero-on-fix to ensure non-zero exit code when fixes are
applied.
- Enabled the 'I' selection to focus on import-related linting rules.
- Ran the linter, and formatted all codebase imports accordingly.
- Removed the black dep from the "dev" group since we use ruff

Signed-off-by: Sébastien Han <seb@redhat.com>

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]

[//]: # (## Documentation)
[//]: # (- [ ] Added a Changelog entry if the change is significant)

Signed-off-by: Sébastien Han <seb@redhat.com>

llama_stack/providers/tests/inference/groq/test_groq_utils.py

@@ -10,11 +10,13 @@ import pytest
 from groq.types.chat.chat_completion import ChatCompletion, Choice
 from groq.types.chat.chat_completion_chunk import (
     ChatCompletionChunk,
-    Choice as StreamChoice,
     ChoiceDelta,
     ChoiceDeltaToolCall,
     ChoiceDeltaToolCallFunction,
 )
+from groq.types.chat.chat_completion_chunk import (
+    Choice as StreamChoice,
+)
 from groq.types.chat.chat_completion_message import ChatCompletionMessage
 from groq.types.chat.chat_completion_message_tool_call import (
     ChatCompletionMessageToolCall,
@@ -23,6 +25,7 @@ from groq.types.chat.chat_completion_message_tool_call import (
 from groq.types.shared.function_definition import FunctionDefinition
 from llama_models.datatypes import GreedySamplingStrategy, TopPSamplingStrategy
 from llama_models.llama3.api.datatypes import ToolParamDefinition
+
 from llama_stack.apis.common.content_types import ToolCallParseStatus
 from llama_stack.apis.inference import (
     ChatCompletionRequest,