ci: update circleci config to handle go mod

Signed-off-by: CrazyMax <[email protected]>

Author: crazy-max

.circleci/config.yml

@@ -12,7 +12,7 @@ jobs:
       OS: linux
       ARCH: amd64
       GOVERSION: 1.17
-      GO111MODULE: "off"
+      GO111MODULE: "on"
       # Needed to install protoc
       PROTOC_VERSION: 3.6.1
 
@@ -77,7 +77,6 @@ jobs:
         environment:
           # ensure GOPATH is set to single directory so the make target doesn't need to handle a column-separated list
           GOPATH: /home/circleci/.go_workspace
-          GO111MODULE: "on"
         command: |
             git fetch origin
             if test -n "`git diff --stat=1000 origin/master | grep -E \"^[[:space:]]*vendor\"`"; then