fix: subst spaces with commas in GO_BUILD_TAGS

Signed-off-by: András Jáky <ajaky@cisco.com>

Makefile

@@ -62,7 +62,7 @@ build: ui build-all-go ## Build all components
 build-all-go: bin/vmclarity-apiserver bin/vmclarity-cli bin/vmclarity-orchestrator bin/vmclarity-ui-backend bin/vmclarity-cr-discovery-server ## Build all go components
 
 BUILD_OPTS = -race
-BUILD_OPTS += -tags="$(GO_BUILD_TAGS)"
+BUILD_OPTS += -tags=$(call subst-space-with-comma,$(GO_BUILD_TAGS))
 
 LDFLAGS = -s -w
 LDFLAGS += -X 'github.com/openclarity/vmclarity/core/version.Version=$(VERSION)'
@@ -494,3 +494,9 @@ endif
 
 $(DIST_DIR)/CHANGELOG.md: $(ROOT_DIR)/cliff.toml bin/git-cliff | $(DIST_DIR)
 	$(GITCLIFF_BIN) --config $(ROOT_DIR)/cliff.toml --output $@ $(GITCLIFF_OPTS)
+
+# helper to create a comma separated list from a space separated list
+null  :=
+space := $(null) #
+comma := ,
+subst-space-with-comma = $(subst $(space),$(comma),$(strip $(1)))