chore(Makefile): Remove PRESERVE_TESTCONTAINERS flag from autogenerated test flags

Author: bartventer

Makefile

@@ -21,7 +21,7 @@ DC_TEST=$(DC) features test
 
 # Devcontainer flags
 DC_TEST_GLOBAL_FLAGS=--global-scenarios-only
-DC_TEST_AUTOGENERATED_FLAGS=--skip-scenarios -f $(FEATURES) -i $(BASE_IMAGE) --preserve-test-containers $(PRESERVE_TESTCONTAINERS)
+DC_TEST_AUTOGENERATED_FLAGS=--skip-scenarios -f $(FEATURES) -i $(BASE_IMAGE)
 DC_TEST_SCENARIOS_FLAGS=-f $(FEATURES) \
 	--skip-autogenerated \
 	--skip-duplicated \