chore!: deprecate eval/tasks (#1186)

# What does this PR do?
- Fully deprecate eval/tasks

[//]: # (If resolving an issue, uncomment and update the line below)
Closes #1088 

NOTE: this will be a breaking change. We have introduced the new API in
0.1.3 .

Notebook has been updated to use the new endpoints.

## Test Plan
```
pytest -v -s --nbval-lax ./docs/notebooks/Llama_Stack_Benchmark_Evals.ipynb 
```
<img width="611" alt="image"
src="https://github.com/user-attachments/assets/79f6efe1-81ba-494e-bf36-1fc0c2b9bc6f"
/>



cc @SLR722  for awareness

[//]: # (## Documentation)

llama_stack/providers/inline/eval/meta_reference/eval.py

@@ -234,45 +234,3 @@ class MetaReferenceEvalImpl(
             raise ValueError(f"Job is not completed, Status: {status.value}")
 
         return self.jobs[job_id]
-
-    async def DEPRECATED_run_eval(
-        self,
-        task_id: str,
-        task_config: BenchmarkConfig,
-    ) -> Job:
-        return await self.run_eval(benchmark_id=task_id, task_config=task_config)
-
-    async def DEPRECATED_evaluate_rows(
-        self,
-        task_id: str,
-        input_rows: List[Dict[str, Any]],
-        scoring_functions: List[str],
-        task_config: BenchmarkConfig,
-    ) -> EvaluateResponse:
-        return await self.evaluate_rows(
-            benchmark_id=task_id,
-            input_rows=input_rows,
-            scoring_functions=scoring_functions,
-            task_config=task_config,
-        )
-
-    async def DEPRECATED_job_status(
-        self,
-        task_id: str,
-        job_id: str,
-    ) -> Optional[JobStatus]:
-        return await self.job_status(benchmark_id=task_id, job_id=job_id)
-
-    async def DEPRECATED_job_cancel(
-        self,
-        task_id: str,
-        job_id: str,
-    ) -> None:
-        return await self.job_cancel(benchmark_id=task_id, job_id=job_id)
-
-    async def DEPRECATED_job_result(
-        self,
-        task_id: str,
-        job_id: str,
-    ) -> EvaluateResponse:
-        return await self.job_result(benchmark_id=task_id, job_id=job_id)