fix(ci): disable workspaces for generate matrix script

Signed-off-by: Kemal Akkoyun <kemal.akkoyun@datadoghq.com>

Author: kakkoyun

.gitlab-ci.yml

@@ -41,7 +41,7 @@ generate_matrix:
       interruptible: true
   script: |
     cd .gitlab
-    go run generate_config.go
+    GOWORK=off go run generate_config.go
     mv generated_benchmark_matrix.yml ../generated_benchmark_matrix.yml
   artifacts:
     paths: