Disable pytest unraisable exception warnings in unitcov tests

During out coverage tests, pytest complains about an unraisable
exception coming from Docling. Normally such an exception would be
entirely ignored and unraised, but pytest is erroring out when it sees
this exception. Docling behavior changed when it cannot find tesserocr
recently by adding a garbage collection method on the tesseract model
object, and if that fails to load properly it can throw this exception
during garbage collection. However, it's a harmless exception since it
failed to load anyway so we don't really care about it erroring out
during garbage collection.

Signed-off-by: Ben Browning <[email protected]>

Author: bbrowning

tox.ini

@@ -19,7 +19,7 @@ wheel_build_env = pkg
 deps = -r requirements-dev.txt
 commands =
     unit: {envpython} -m pytest {posargs:tests --ignore=tests/functional}
-    unitcov: {envpython} -W error::UserWarning -m pytest --cov=instructlab.sdg --cov-report term --cov-report=html:coverage-{env_name} --cov-report=xml:coverage-{env_name}.xml --html=durations/{env_name}.html {posargs:tests --ignore=tests/functional -m "not (examples or gpu)"}
+    unitcov: {envpython} -W error::UserWarning -m pytest --cov=instructlab.sdg --cov-report term --cov-report=html:coverage-{env_name} --cov-report=xml:coverage-{env_name}.xml --html=durations/{env_name}.html -p no:unraisableexception {posargs:tests --ignore=tests/functional -m "not (examples or gpu)"}
     functional: {envpython} -m pytest {posargs:tests/functional -m "not gpu"}
 
 # format, check, and linting targets don't build and install the project to