chore(llmobs): fix tests to be less noisy locally (#11890)

These tests rely on env vars that may already be present on dev envs and
will result in noisy errors as a result.

## Checklist
- [x] PR author has checked that all the criteria below are met
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- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
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[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
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[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
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Author: Yun-Kim

tests/llmobs/test_llmobs_evaluator_runner.py

@@ -64,15 +64,7 @@ def test_evaluator_runner_on_exit(mock_writer_logs, run_python_code_in_subproces
     pypath = [os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__))))]
     if "PYTHONPATH" in env:
         pypath.append(env["PYTHONPATH"])
-    env.update(
-        {
-            "DD_API_KEY": os.getenv("DD_API_KEY", "dummy-api-key"),
-            "DD_SITE": "datad0g.com",
-            "PYTHONPATH": ":".join(pypath),
-            "DD_LLMOBS_ML_APP": "unnamed-ml-app",
-            "_DD_LLMOBS_EVALUATOR_INTERVAL": "5",
-        }
-    )
+    env.update({"PYTHONPATH": ":".join(pypath), "_DD_LLMOBS_EVALUATOR_INTERVAL": "5"})
     out, err, status, pid = run_python_code_in_subprocess(
         """
 import os
@@ -87,7 +79,7 @@ def test_evaluator_runner_on_exit(mock_writer_logs, run_python_code_in_subproces
 ctx = logs_vcr.use_cassette("tests.llmobs.test_llmobs_evaluator_runner.send_score_metric.yaml")
 ctx.__enter__()
 atexit.register(lambda: ctx.__exit__())
-LLMObs.enable()
+LLMObs.enable(api_key="dummy-api-key", site="datad0g.com", ml_app="unnamed-ml-app")
 LLMObs._instance._evaluator_runner.evaluators.append(DummyEvaluator(llmobs_service=LLMObs))
 LLMObs._instance._evaluator_runner.start()
 LLMObs._instance._evaluator_runner.enqueue({"span_id": "123", "trace_id": "1234"}, None)

tests/llmobs/test_llmobs_ragas_evaluators.py

@@ -206,14 +206,11 @@ def test_llmobs_with_faithfulness_emits_traces_and_evals_on_exit(mock_writer_log
         pypath.append(env["PYTHONPATH"])
     env.update(
         {
-            "DD_API_KEY": os.getenv("DD_API_KEY", "dummy-api-key"),
-            "DD_SITE": "datad0g.com",
             "PYTHONPATH": ":".join(pypath),
             "OPENAI_API_KEY": os.getenv("OPENAI_API_KEY", "dummy-openai-api-key"),
-            "DD_LLMOBS_ML_APP": "unnamed-ml-app",
             "_DD_LLMOBS_EVALUATOR_INTERVAL": "5",
             "_DD_LLMOBS_EVALUATORS": "ragas_faithfulness",
-            "DD_LLMOBS_AGENTLESS_ENABLED": "1",
+            "DD_TRACE_ENABLED": "0",
         }
     )
     out, err, status, pid = run_python_code_in_subprocess(
@@ -232,14 +229,8 @@ def test_llmobs_with_faithfulness_emits_traces_and_evals_on_exit(mock_writer_log
 )
 ctx.__enter__()
 atexit.register(lambda: ctx.__exit__())
-with mock.patch(
-    "ddtrace.internal.writer.HTTPWriter._send_payload",
-    return_value=Response(
-        status=200,
-        body="{}",
-    ),
-):
-    LLMObs.enable()
+with mock.patch("ddtrace.internal.writer.HTTPWriter._send_payload", return_value=Response(status=200, body="{}")):
+    LLMObs.enable(api_key="dummy-api-key", site="datad0g.com", ml_app="unnamed-ml-app", agentless_enabled=True)
     LLMObs._instance._evaluator_runner.enqueue(_llm_span_with_expected_ragas_inputs_in_messages(), None)
     """,
         env=env,