Add concurrency to GHA

Co-authored-by: Yagiz Nizipli <yagiz@nizipli.com>

Author: bbayles

.github/workflows/build_test.yml

@@ -2,6 +2,10 @@ name: Build and test
 
 on: [push, pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+  
 jobs:
   build_test:
     strategy: