Wrap AIRFLOW_HOME env var lookup in Path

[drajguru]

When testing the change with AIRFLOW_HOME env var set.
related: #37697

❯ breeze cleanup
Removing cache of parameters, and cleans up docker cache
Removing unused networks

Are you sure with the removal of unused docker networks?
Press y/N/q:
Pruning docker images

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Removing build cache dir /home/dylanr/code/airflow/.build

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Uninstalling airflow and removing configuration

Are you sure with the uninstall / remove?
Press y/N/q: y
Traceback (most recent call last):
File "/home/dylanr/.local/bin/breeze", line 8, in
sys.exit(main())
File "/home/dylanr/.local/share/pipx/venvs/apache-airflow-breeze/lib/python3.10/site-packages/click/core.py", line 1157, in call
return self.main(*args, **kwargs)
File "/home/dylanr/.local/share/pipx/venvs/apache-airflow-breeze/lib/python3.10/site-packages/rich_click/rich_command.py", line 126, in main
rv = self.invoke(ctx)
File "/home/dylanr/.local/share/pipx/venvs/apache-airflow-breeze/lib/python3.10/site-packages/click/core.py", line 1688, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/dylanr/.local/share/pipx/venvs/apache-airflow-breeze/lib/python3.10/site-packages/click/core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/dylanr/.local/share/pipx/venvs/apache-airflow-breeze/lib/python3.10/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/home/dylanr/code/airflow/dev/breeze/src/airflow_breeze/commands/main_command.py", line 296, in cleanup
AIRFLOW_HOME_DIR.mkdir(exist_ok=True, parents=True)
AttributeError: 'str' object has no attribute 'mkdir'

[dirrao]

LGTM. Can you look into the failing test cases?

[potiuk]

I just rebased it for. You. whenever you see unrelated issues, and you are behind latest main, first thing to do is to rebase your PR.