feat: dynamic selectors with alert_foreign_logs_enricher

[nherment]

This adds support for calling the logs enricher based on the labels of a prometheus alert

Documentation

[Avi-Robusta]

this import looks like the issue with pytest

2024-10-18 12:51:43.140 ERROR    failed to module alerts_integration
Traceback (most recent call last):
  File "/app/src/robusta/runner/config_loader.py", line 1[82](https://github.com/robusta-dev/robusta/actions/runs/11403920443/job/31731978176?pr=1600#step:11:83), in __import_playbooks_package
    m = importlib.reload(importlib.import_module(module_name))
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 6[90](https://github.com/robusta-dev/robusta/actions/runs/11403920443/job/31731978176?pr=1600#step:11:91), in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/venv/lib/python3.11/site-packages/robusta_playbooks/alerts_integration.py", line 11, in <module>
    from playbooks.robusta_playbooks.util import resolve_selectors
ModuleNotFoundError: No module named 'playbooks'

[arikalon1]

if it's a code that is common to different playbooks packages, maybe it's better to put in in the core package, and not in the playbooks package

playbooks packages are loaded dynamically, so having dependencies between playbooks file must validate the are loaded in the right order (with the core package, this problem doesn't exist)

[nherment]

@arikalon1 As this PR adds no more imports than were already existing I suggest to make that change in another PR if you think it's warranted.

[arikalon1]

nice work!

[nherment]

Fixes #1529