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.

.github/workflows/crypto-tests.yml

@@ -36,5 +36,9 @@ jobs:
             -p schnorr-signatures \
             -p dleq \
             -p dkg \
+            -p dkg-recovery \
+            -p dkg-promote \
+            -p dkg-musig \
+            -p dkg-pedpop \
             -p modular-frost \
             -p frost-schnorrkel