Allow to configure deb build dependencies by repository

[SirTakobi]

Is your feature request related to a problem?
Yes, some modules require pip packages that require deb packages in order to be installed.
An example is in https://github.com/OCA/server-tools/blob/10.0/base_external_dbsource_odbc: it depends on pyodbc (https://pypi.org/project/pyodbc) that needs unixodbc-dev, as explained in its documentation https://github.com/mkleehammer/pyodbc/wiki/Install#installing-on-linux

Describe the solution you'd like
Configure apt packages on a per-repo basis that will be installed before installing Python libraries.

Describe alternatives you've considered
A step can be added in the github actions that installs the apt packages before installing pip packages, but as far I as understand, that is discouraged.
Currently there is nothing similar for runboat

Additional context
Similar to #33.
I ran into this while trying to add https://github.com/OCA/oca-addons-repo-template to https://github.com/OCA/server-tools/tree/10.0 in OCA/server-tools#2486.
There is some discussion already in https://discord.com/channels/737652535149592587/761225067798462465/1067129843130581083

[sbidoul]

I'm not sure it's worth the additional complexity. In practice this happens rarely, as more and more projects publish wheels on PyPI.