deb: skip running tests

Running tests with luatest [1] means we need to install luatest first.
(It is also not provided in packpack.) Installing external dependency
from net while doing deb packing is mostly discouraged, so we skip this
step for now (similar to [2]).

1. https://github.com/tarantool/luatest
2. tarantool/expirationd@e13b51d

Part of tarantool/tarantool#7726

Author: DifferentialOrange

debian/rules

@@ -2,3 +2,8 @@
 
 %:
 	dh $@
+
+override_dh_auto_build:
+
+override_dh_auto_test:
+	DEB_BUILD_OPTIONS=nocheck dh_auto_test