Change parameter types from Iterable[str] to Collection[str] wherever
the parameter is tested for emptiness (if not names). This satisfies
the new truthy-iterable mypy rule, since bare Iterable values are
always truthy even when empty.
Affected files:
- Distro.py: install, delete, select, _select, _select_by_name
- rpm.py: query_packages
- suse/Distro.py: _select_by_name
- Cmd.py (secrets): _match_files, _list_template_files, etc.
- DistroContext.py: list_template_files, list_secret_paths, etc.
Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev 0.81.1
Signed-off-by: Jan Lindemann <jan@janware.com>