Fix import_root in case a Path object was submitted

[ogenstad]

This PR fixes an issue that can occur if a Path object is passed to the importer instead of an str, mypy failed to see these issues.

To illustrate the problem that might occur we can create a local file:

❯ cat /tmp/test_module.py
print("successfully imported")

Then in a separate location we run:

import sys
from pathlib import Path

import importlib

path = Path("/tmp")

sys.path.append(path)

importlib.import_module("test_module")

It fails with:

>>> importlib.import_module("test_module")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>

  File "/nix/store/w2sjj4z4bxbh67yw38pqzx290bw3pra8-python3-3.12.5/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1324, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'test_module'
>>>

If we instead use:

import sys
import importlib

path = "/tmp"

sys.path.append(path)

importlib.import_module("test_module")

The operation is successful:

>>> importlib.import_module("test_module")
successfully imported
<module 'test_module' from '/tmp/test_module.py'>

Later we should rewrite these functions to instead expect Path objects but ensure that we add them as strings to sys.path.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

@@           Coverage Diff            @@
##           develop     #181   +/-   ##
========================================
  Coverage    66.16%   66.17%           
========================================
  Files           76       76           
  Lines         7046     7047    +1     
  Branches      1392     1392           
========================================
+ Hits          4662     4663    +1     
  Misses        1998     1998           
  Partials       386      386           

Flag	Coverage Δ
python-3.10	44.98% <100.00%> (+<0.01%)	⬆️
python-3.11	44.98% <100.00%> (+<0.01%)	⬆️
python-3.12	44.98% <100.00%> (+<0.01%)	⬆️
python-3.13	44.98% <100.00%> (+<0.01%)	⬆️
python-3.9	44.05% <0.00%> (-0.01%)	⬇️
python-filler-3.12	23.98% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
infrahub_sdk/_importer.py	74.28% <100.00%> (+0.75%)	⬆️

[dgarros]

All good