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/remote/inference/nvidia/openai_utils.py

@@ -22,17 +22,35 @@ from llama_models.llama3.api.datatypes import (
 from openai import AsyncStream
 from openai.types.chat import (
     ChatCompletionAssistantMessageParam as OpenAIChatCompletionAssistantMessage,
+)
+from openai.types.chat import (
     ChatCompletionChunk as OpenAIChatCompletionChunk,
+)
+from openai.types.chat import (
     ChatCompletionContentPartImageParam as OpenAIChatCompletionContentPartImageParam,
+)
+from openai.types.chat import (
     ChatCompletionContentPartParam as OpenAIChatCompletionContentPartParam,
+)
+from openai.types.chat import (
     ChatCompletionMessageParam as OpenAIChatCompletionMessage,
+)
+from openai.types.chat import (
     ChatCompletionMessageToolCallParam as OpenAIChatCompletionMessageToolCall,
+)
+from openai.types.chat import (
     ChatCompletionSystemMessageParam as OpenAIChatCompletionSystemMessage,
+)
+from openai.types.chat import (
     ChatCompletionToolMessageParam as OpenAIChatCompletionToolMessage,
+)
+from openai.types.chat import (
     ChatCompletionUserMessageParam as OpenAIChatCompletionUserMessage,
 )
 from openai.types.chat.chat_completion import (
     Choice as OpenAIChoice,
+)
+from openai.types.chat.chat_completion import (
     ChoiceLogprobs as OpenAIChoiceLogprobs,  # same as chat_completion_chunk ChoiceLogprobs
 )
 from openai.types.chat.chat_completion_content_part_image_param import (
@@ -69,7 +87,6 @@ from llama_stack.apis.inference import (
     ToolResponseMessage,
     UserMessage,
 )
-
 from llama_stack.providers.utils.inference.prompt_adapter import (
     convert_image_content_to_url,
 )