Params missing in some yaml

[sgiardie]

Hi @HTJense, there are some parameters missing in some yaml files:

• an alpha_tSZ block in params/foregrounds.yaml, which is in the current default so we need it
• defining calG_all in act_dr6.yaml and act_dr6_polcuts.yaml

(I would open a PR to solve these but you should grant me the permission to push branches)

Maybe in general it can be useful to add the default yaml files to use for ACT+Planck and other data combination. This is useful for people that will run the different parameter extensions and that need to find default files here.

[HTJense]

Resolved #12.