* Move `sp-npos-elections-solution-type`
to `frame-election-provider-support`
First stab at it, will need to amend some more stuff
* Fixing tests
* Fixing tests
* Fixing cargo.toml for std configuration
* fmt
* Committing suggested changes
renaming, and re exporting macro.
* Removing unneeded imports
* Move `NposSolution` to frame
* Removing `npos_election` dependencies
Implementing _fpes better
* some feedback for moving NPoSSolution to frame
* fmt
* more formatting
* Fixed some imports and fmt
* Fixing docs
Co-authored-by: kianenigma <kian@parity.io>