Don't try to infer the dependencies directory in component compile

We mount the component repo at `/<component-name>` in the Docker
container when using `component compile` in the component template. In
that case, the old code inferred `dependencies_dir` as `/` which isn't
writable in the container environment.

This commit adjusts the implementation to use
`config.inventory.dependencies_dir` which should always be writable.
Since we don't actually use any functionality backed by
`MultiDependency` in `component compile` it shouldn't matter whether we
actually find the correct dependencies directory in all cases.

Author: simu

commodore/component/compile.py

@@ -143,7 +143,7 @@ def _setup_component(
         target_dir = P(cr.working_tree_dir)
         # compute subpath from Repo working tree dir and component path
         sub_path = str(component_path.absolute().relative_to(target_dir))
-        cdep = MultiDependency(cr.remote().url, target_dir.parent)
+        cdep = MultiDependency(cr.remote().url, config.inventory.dependencies_dir)
     except git.InvalidGitRepositoryError:
         click.echo(" > Couldn't determine Git repository for component")
         # Just treat `component_path` as a directory holding a component, don't care