Add --without build-stamp to dh invocation

Additionally, the attached patch, debian_rules.diff, adds
--without=build-stamp to the dh line in debian/rules to avoid that the
install stage tries to find php7.4-interbase from the generated file
debian/debhelper-build-stamp.  Searching for that file after building
gives no hits at all, and the origin of that file is unknown.

debian/rules

@@ -254,7 +254,7 @@ ext_config     += $(foreach ext_ext,$(ext_EXTENSIONS),$($(ext_ext)_config))
 #$(info Enabled config $(ext_config))
 
 %:
-	dh $@ --with systemd --with apache2 --without autoreconf $(PARALLEL)
+	dh $@ --with systemd --with apache2 --without=build-stamp --without autoreconf $(PARALLEL)
 
 PREPARE_FILES := $(addprefix debian/,$(shell cat debian/prepare-files))