Simplify buf binary install (#1814)

Use simple `go install` to handle the install of hte `buf` tool.

Signed-off-by: SuperQ <superq@gmail.com>

Author: SuperQ

.bingo/.gitignore

@@ -11,9 +11,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-include .bingo/Variables.mk
 include Makefile.common
 
+BUF := $(FIRST_GOPATH)/bin/buf
+BUF_VERSION ?= v1.39.0
+
+$(BUF):
+	go install github.com/bufbuild/buf/cmd/buf@$(BUF_VERSION)
+
 .PHONY: deps
 deps:
 	$(MAKE) common-deps