Fix code style check in "all" make target

The all target should abort on incorrectly formatted code, instead of
formatting it. The CI pipeline should fail and not silently accept
wrong code.

Signed-off-by: Tobias Schmidt <tobidt@gmail.com>

Makefile

@@ -72,7 +72,7 @@ $(eval $(call goarch_pair,arm64,arm))
 $(eval $(call goarch_pair,mips64,mips))
 $(eval $(call goarch_pair,mips64el,mipsel))
 
-all: format vet staticcheck checkmetrics build test $(cross-test) $(test-e2e)
+all: style vet staticcheck checkmetrics build test $(cross-test) $(test-e2e)
 
 style:
 	@echo ">> checking code style"