Mute marginal cpu overspending

There exists logs that a user has overspent with a factor of 1.0. This is not very
interesting, so skip logging anything that we don't find significant.

src/ert/ensemble_evaluator/evaluator.py

@@ -466,6 +466,7 @@ def _get_ens_id(source: str) -> str:
 def detect_overspent_cpu(num_cpu: int, real_id: str, fm_step: FMStepSnapshot) -> str:
     """Produces a message warning about misconfiguration of NUM_CPU if
     so is detected. Returns an empty string if everything is ok."""
+    allowed_overspending = 1.05
     now = datetime.datetime.now()
     duration = (
         (fm_step.get(ids.END_TIME) or now) - (fm_step.get(ids.START_TIME) or now)
@@ -474,7 +475,7 @@ def detect_overspent_cpu(num_cpu: int, real_id: str, fm_step: FMStepSnapshot) ->
         return ""
     cpu_seconds = fm_step.get(ids.CPU_SECONDS) or 0.0
     parallelization_obtained = cpu_seconds / duration
-    if parallelization_obtained > num_cpu:
+    if parallelization_obtained > num_cpu * allowed_overspending:
         return (
             f"Misconfigured NUM_CPU, forward model step '{fm_step.get(ids.NAME)}' for "
             f"realization {real_id} spent {cpu_seconds} cpu seconds "

tests/ert/unit_tests/ensemble_evaluator/test_ensemble_evaluator.py

@@ -536,8 +536,8 @@ async def test_ensure_multi_level_events_in_order(evaluator_to_use):
 @given(
     num_cpu=st.integers(min_value=1, max_value=64),
     start=st.datetimes(),
-    duration=st.integers(min_value=-1, max_value=10000),
-    cpu_seconds=st.floats(min_value=0),
+    duration=st.integers(min_value=-1, max_value=1000),
+    cpu_seconds=st.floats(min_value=0, max_value=2000),
 )
 def test_overspent_cpu_is_logged(
     num_cpu: int,
@@ -554,7 +554,7 @@ def test_overspent_cpu_is_logged(
             cpu_seconds=cpu_seconds,
         ),
     )
-    if duration > 0 and cpu_seconds / duration > num_cpu:
+    if duration > 0 and cpu_seconds / duration > num_cpu * 1.05:
         assert "Misconfigured NUM_CPU" in message
     else:
         assert "NUM_CPU" not in message