[CHORE] Cancel test runs on update to the same ref.

.github/workflows/_go-tests.yml

@@ -3,6 +3,9 @@ name: Go tests
 on:
   workflow_call:
 
+concurrency:
+  cancel-in-progress: true
+
 jobs:
   test:
     strategy:

.github/workflows/_javascript-client-tests.yml

@@ -3,6 +3,9 @@ name: JavaScript client tests
 on:
   workflow_call:
 
+concurrency:
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: depot-ubuntu-22.04

.github/workflows/_python-tests.yml

@@ -13,6 +13,9 @@ on:
         required: true
         type: string
 
+concurrency:
+  cancel-in-progress: true
+
 jobs:
   test:
     timeout-minutes: 90

.github/workflows/_rust-tests.yml

@@ -3,6 +3,9 @@ name: Rust tests
 on:
   workflow_call:
 
+concurrency:
+  cancel-in-progress: true
+
 jobs:
   test:
     strategy:

.github/workflows/pr.yml

@@ -5,6 +5,9 @@ on:
       - main
       - '**'
 
+concurrency:
+  cancel-in-progress: true
+
 jobs:
   # GitHub only provides a way to do path filtering at the workflow level rather than the job level.
   # This allows us to selectively run jobs based on changed paths.