This renames and moves the `SystemInherentData` into its own crate.
The struct is now called `ParachainInherentData`. Besides moving the
struct, this also moves the code for creating this struct into this crate.
* Move pallets to pallets folder and rename them
* Move genesis file to service
* Rename primitives to primitives-core
* Delete cumulus-runtime
* Move stuff to client folder and rename