Smash dkg into dkg, dkg-[recovery, promote, musig, pedpop]

promote and pedpop require dleq, which don't support no-std. All three should
be moved outside the Serai repository, per #597, as none are planned for use
and worth covering under our BBP.

tests/no-std/src/lib.rs

@@ -13,6 +13,8 @@ pub use dleq;
 pub use schnorr_signatures;
 
 pub use dkg;
+pub use dkg_recovery;
+pub use dkg_musig;
 /*
 pub use modular_frost;
 pub use frost_schnorrkel;