chore: Don't be verbose with tests locally (#620)

It can sometimes be unwieldy when running tests with the verbose flag. This changes the Makefile to run tests without the flag by default but with the flag set on GitHub Actions.

Signed-off-by: Ian Lewis <ianlewis@google.com>

Makefile

@@ -26,15 +26,25 @@ node_modules/.installed: package.json package-lock.json
 
 .PHONY: unit-test
 unit-test: ## Runs all unit tests.
-	go mod vendor
-	# NOTE: go test builds packages even if there are no tests.
-	go test -mod=vendor -v ./...
+	@ # NOTE: go test builds packages even if there are no tests.
+	@set -e;\
+		go mod vendor; \
+		extraargs=""; \
+		if [ "$(OUTPUT_FORMAT)" == "github" ]; then \
+			extraargs="-v"; \
+		fi; \
+		go test -mod=vendor $$extraeargs ./...
 
 .PHONY: regression-test
 regression-test: ## Runs all regression and unit tests.
-	go mod vendor
-	# NOTE: go test builds packages even if there are no tests.
-	go test -mod=vendor -tags=regression -v -timeout=25m ./...
+	@ # NOTE: go test builds packages even if there are no tests.
+	@set -e;\
+		go mod vendor; \
+		extraargs=""; \
+		if [ "$(OUTPUT_FORMAT)" == "github" ]; then \
+			extraargs="-v"; \
+		fi; \
+		go test -mod=vendor -tags=regression $$extraeargs -timeout=25m ./...
 
 ## Tools
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