Make `kubescape-cli-e2e-tests.yaml` workflows more generic

Can we make the reusable workflow more "generic"? For now, it requires some parameters that are close to **regolibrary** (eg. `DOWNLOAD_ARTIFACT_PATH`).
If I want to use this workflow to test **host-scanner**, I should provide the `DOWNLOAD_ARTIFACT_PATH` as well, even if it is not in the scope of the test.
So, if it's possible, we should make this input optional and modify the `systest-cli.py` command at the end of the pipeline to make it more "flexible" in order to provide additional `kwargs`, depending on the component that we are testing.
For example, we could use an input called `ADDITIONAL_KWARGS` that we are going to append at the end of the command, so we can test each component (**host-scanner**, **regolibrary**, etc.) specifying the needed `kwargs`.
This is not something of high priority, but we can see it as an improvement to make the reusable workflow more reusable.

Start with the reusable kubescape-cli-e2e-tests.yaml workflow and the systest-cli.py command it invokes at the end of the pipeline. Trace how DOWNLOAD_ARTIFACT_PATH is passed and how workflow inputs become command arguments. Done means the workflow can be reused for host-scanner and regolibrary without irrelevant required inputs, while allowing component-specific additional kwargs.

Written by the indexing model from the issue text.