cmd_clean command removes wrong packages

The command removes all package revisions except for the latest one from a **recipe**, but not a **package**. This leads to the following: if I build two packages for a single recipe, for example, Debug and Release one, "conan clean" removes one of them (the one that was built the first, I suppose).

I think the correct behaviour would be if this:

```py
all_prevs = conan_api.search.package_revisions(f"{rrev.repr_notime()}:*#*", remote=remote)
# ...
```

is replaced with this:

```py
packages = conan_api.list.packages_configurations(rrev, remote=remote)
for package in packages:
all_prevs = conan_api.search.package_revisions(repr(package), remote=remote)
# ...
```

At least, with such fix the behaviour looks like what I expected, so far.