fix!: update eval-tasks -> benchmarks (#1032)

# What does this PR do?

- Update `/eval-tasks` to `/benchmarks`
- ⚠️ Remove differentiation between `app` v.s. `benchmark` eval task
config. Now we only have `BenchmarkConfig`. The overloaded `benchmark`
is confusing and do not add any value. Backward compatibility is being
kept as the "type" is not being used anywhere.

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

## Test Plan
- This change is backward compatible 
- Run notebook test with

```
pytest -v -s --nbval-lax ./docs/getting_started.ipynb
pytest -v -s --nbval-lax ./docs/notebooks/Llama_Stack_Benchmark_Evals.ipynb
```

<img width="846" alt="image"
src="https://github.com/user-attachments/assets/d2fc06a7-593a-444f-bc1f-10ab9b0c843d"
/>



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

---------

Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>
Signed-off-by: Ben Browning <bbrownin@redhat.com>
Signed-off-by: Sébastien Han <seb@redhat.com>
Signed-off-by: reidliu <reid201711@gmail.com>
Co-authored-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>
Co-authored-by: Ben Browning <ben324@gmail.com>
Co-authored-by: Sébastien Han <seb@redhat.com>
Co-authored-by: Reid <61492567+reidliu41@users.noreply.github.com>
Co-authored-by: reidliu <reid201711@gmail.com>
Co-authored-by: Yuan Tang <terrytangyuan@gmail.com>

llama_stack/distribution/resolver.py

@@ -9,10 +9,10 @@ import logging
 from typing import Any, Dict, List, Set
 
 from llama_stack.apis.agents import Agents
+from llama_stack.apis.benchmarks import Benchmarks
 from llama_stack.apis.datasetio import DatasetIO
 from llama_stack.apis.datasets import Datasets
 from llama_stack.apis.eval import Eval
-from llama_stack.apis.eval_tasks import EvalTasks
 from llama_stack.apis.inference import Inference
 from llama_stack.apis.inspect import Inspect
 from llama_stack.apis.models import Models
@@ -37,8 +37,8 @@ from llama_stack.distribution.store import DistributionRegistry
 from llama_stack.distribution.utils.dynamic import instantiate_class_type
 from llama_stack.providers.datatypes import (
     Api,
+    BenchmarksProtocolPrivate,
     DatasetsProtocolPrivate,
-    EvalTasksProtocolPrivate,
     InlineProviderSpec,
     ModelsProtocolPrivate,
     ProviderSpec,
@@ -73,7 +73,7 @@ def api_protocol_map() -> Dict[Api, Any]:
         Api.scoring: Scoring,
         Api.scoring_functions: ScoringFunctions,
         Api.eval: Eval,
-        Api.eval_tasks: EvalTasks,
+        Api.benchmarks: Benchmarks,
         Api.post_training: PostTraining,
         Api.tool_groups: ToolGroups,
         Api.tool_runtime: ToolRuntime,
@@ -92,7 +92,7 @@ def additional_protocols_map() -> Dict[Api, Any]:
             ScoringFunctions,
             Api.scoring_functions,
         ),
-        Api.eval: (EvalTasksProtocolPrivate, EvalTasks, Api.eval_tasks),
+        Api.eval: (BenchmarksProtocolPrivate, Benchmarks, Api.benchmarks),
     }