salsa-ci should be unpacking subcomponents just as dpkg-source --extract does

Update 1: the real problem is that in my case, I need an override to download from upstream instead of gbp export-orig, cause the package by export-orig containing only the main orig.

Update 2: Salsa-CI could use multiple origs now if a gbp.conf with component description is included, however, the component origs are not extracted automatically.

I am working on wayfire, https://salsa.debian.org/EiPiFun/wayfire-eipifun/ The problem is that I cannot import multiple origs in salsa ci. The workaround I use is to extract them to debian/missing-sources. I think it is an abuse of of missing-sources.

How can I define values like SALSA_CI_GBP_BUILDPACKAGE_ARGS to add components (--git-component=wf-touch --git-component=wf-utils) outside the salsa.yml? As the below shows, it could only use one orig when extracting source. https://salsa.debian.org/EiPiFun/wayfire-eipifun/-/jobs/6784964

Otherwise, I need to fork and include my salsa-ci.yml