Add and configure Spacewalk pallets for Foucoco runtime

[ebma]

Since we want to launch Spacewalk on Amplitude, we need to include and configure the pallets in the Amplitude runtime. Before taking this step on Amplitude it might make sense however to first test the changes and upgrade on Foucoco.

This issue is about adding all the pallets included in spacewalk/pallets to the foucoco and amplitude runtime. Since they are not merged to main, it makes sense to declare the dev/milestone-3 branch in the 'Cargo.toml' files. Eventually, we would probably create an extra polkadot-v0.9.35 branch in the spacewalk repository, but only after merging it to main. Inspiration for the appropriate configuration of the pallets can be drawn from the mock.rs files of each pallet in the spacewalk repository.

[ebma]

This requires #87.

[ebma]

I split this ticket into two separate tasks since it is probably a good idea to work on the Foucoco runtime first. The other ticket is #90.

[b-yap]

launched last Friday, at block 4,056,711