Makefile fix kind-install-cilium-fast target

The kind-install-cilium-fast should install Cilium on all available
kind clusters.

Fixes: 5f88bbf ("docs: Add Makefile and documentation for "fast" development targets")
Signed-off-by: André Martins <andre@cilium.io>

Makefile

@@ -575,18 +575,13 @@ endif
 .PHONY: kind-install-cilium-fast
 kind-install-cilium-fast: kind-ready ## Install a local Cilium version into the cluster.
 	@echo "  INSTALL cilium"
-	# cilium-cli doesn't support idempotent installs, so we uninstall and
-	# reinstall here. https://github.com/cilium/cilium-cli/issues/205
-	-@$(CILIUM_CLI) uninstall >/dev/null 2>&1 || true
-
-	# cilium-cli's --wait flag doesn't work, so we just force it to run
-	# in the background instead and wait for the resources to be available.
-	# https://github.com/cilium/cilium-cli/issues/1070
-	$(CILIUM_CLI) install \
-		--chart-directory=$(ROOT_DIR)/install/kubernetes/cilium \
-		$(KIND_VALUES_FAST_FILES) \
-		--version= \
-		>/dev/null 2>&1 &
+	for cluster_name in $${KIND_CLUSTERS:-$(shell kind get clusters)}; do \
+		$(CILIUM_CLI) --context=kind-$$cluster_name uninstall >/dev/null 2>&1 || true; \
+		$(CILIUM_CLI) install --context=kind-$$cluster_name \
+			--chart-directory=$(ROOT_DIR)/install/kubernetes/cilium \
+			$(KIND_VALUES_FAST_FILES) \
+			--version= >/dev/null 2>&1 & \
+	done
 
 .PHONY: build-cli
 build-cli: ## Build cilium cli binary