pkg/debian: use cmake as buildsystem

When building debian packages a lot of errors occur.
After investigation, it seems that happens due to
`dh` (debhelpers, see https://manpages.debian.org/testing/debhelper/dh.1.en.html)
treating the top-level Makefile as build tool for some steps.

The top-level Makefile was created only for testing/CI purposes.
When building packages, we should make use of cmake - this is exactly
what this commit does.

Author: muzarski

dist/debian/debian/rules

@@ -14,7 +14,7 @@ export CARGO_HOME
 export RUSTUP_HOME
 
 %:
-	dh $@
+	dh $@ --buildsystem=cmake
 
 override_dh_auto_clean:
 	rm -rf scylla-rust-wrapper/.cargo