TrackCosts are retained more than expected for Darwin-x86-64

### Summary

The testcase `trackCostsRetaining` https://github.com/IntersectMBO/plutus/blob/master/plutus-core/untyped-plutus-core/test/Evaluation/Builtins/Definition.hs#L458

fails only on Darwin-x86-64 with message:

```
TrackCosts: retaining: FAIL (0.51s)
untyped-plutus-core/test/Evaluation/Builtins/Definition.hs:482:
Too many elements picked up by GC
Expected at most: 5
But got: 6
The result was: [6829,0,0,0,0,3173]
Use -p '/TrackCosts: retaining/' to rerun this test only.
```

See also: https://ci.iog.io/build/5076829

@effectfully

### Steps to reproduce the behavior

_No response_

### Actual Result

_No response_

### Expected Result

_No response_

### Describe the approach you would take to fix this

_No response_

### System info

OS: Darwin-x86-64
Plutus-1.32