fix: isolate container pip from host pythonpath in package-app-dependencies hook

[athreya-splunk]

Fix package-app-dependencies failing in CI due to host pre-commit PYTHONPATH leaking into container pip. The pre-commit env is now created on Python 3.13 with newer pip, and container pip3.9 was importing that
host pip, causing a dataclass(..., slots=True) crash. This change isolates the pre-commit path for local_hooks imports only and clears it for container pip commands.

Tested here by creating temporary PR with this branch as ref splunk-soar-connectors/salesforce#24

Run verifying fix in repo with wheels in it - https://github.com/splunk-soar-connectors/googleworkspacefordrive/pull/35/changes (no more TypeError: dataclass() got an unexpected keyword argument 'slots' error

Failure seen in multiple repos -
https://github.com/splunk-soar-connectors/salesforce/actions/runs/25104646229/job/73562620180?pr=22

Traceback (most recent call last):
File "/opt/python/cp39-cp39/bin/pip3.9", line 8, in <module>
  sys.exit(main())
File "/site-packages/pip/_internal/cli/main.py", line 47, in main
  from pip._internal.cli.autocompletion import autocomplete
File "/site-packages/pip/_internal/cli/autocompletion.py", line 12, in <module>
  from pip._internal.cli.main_parser import create_main_parser
File "/site-packages/pip/_internal/cli/main_parser.py", line 11, in <module>
  from pip._internal.build_env import get_runnable_pip
File "/site-packages/pip/_internal/build_env.py", line 22, in <module>
  from pip._internal.cli.spinners import open_rich_spinner, open_spinner
File "/site-packages/pip/_internal/cli/spinners.py", line 22, in <module>
  from pip._internal.utils.logging import get_console, get_indentation
File "/site-packages/pip/_internal/utils/logging.py", line 32, in <module>
  from pip._internal.utils.misc import StreamWrapper, ensure_dir
File "/site-packages/pip/_internal/utils/misc.py", line 36, in <module>
  from pip._internal.locations import get_major_minor_version
File "/site-packages/pip/_internal/locations/__init__.py", line 10, in <module>
  from pip._internal.models.scheme import SCHEME_KEYS, Scheme
File "/site-packages/pip/_internal/models/scheme.py", line 13, in <module>
  @dataclass(frozen=True, slots=True)
TypeError: dataclass() got an unexpected keyword argument 'slots'

[mnordby-splunk]

Confirmed this resolved the issue here: https://github.com/splunk-soar-connectors/awss3/actions/runs/25342919719/job/74304540009?pr=24