ci: the runners need libsodium-dev for clusterer_controller

Every workflow that builds the full default tree (Main CI, Unit
Tests, the qemu multiarch variants) stopped at clusterer_controller's
fail-loud libsodium check - upstream's dependency list predates the
module. The plain cross-compile variants never saw it because they
build without target libraries.

Author: Lt-Flash

scripts/build/apt_requirements.txt

@@ -21,6 +21,7 @@ librabbitmq-dev
 libradcli-dev
 libsctp-dev
 libsnmp-dev
+libsodium-dev
 libsqlite3-dev
 libwolfssl-dev
 libxml2-dev