chore: use just one shard for the secure site (#4269)

Author: lukaisailovic

.github/workflows/pr_checks.yml

@@ -248,3 +248,4 @@ jobs:
     with:
       branch: ${{ github.ref }}
       build-and-cache-only: ${{ github.event_name == 'push' }}
+      matrix_config: '{"shard":[1, 2, 3, 4, 5, 6, 7, 8, 9, 10], "shardTotal":[10]}'

.github/workflows/ui_tests.yml

@@ -43,6 +43,11 @@ on:
         required: false
         default: false
         type: boolean
+      matrix_config:
+        description: 'The matrix configuration for sharding as a JSON string.'
+        required: false
+        default: '{"shard":[1], "shardTotal":[1]}'
+        type: string
     secrets:
       NEXT_PUBLIC_PROJECT_ID:
         required: true
@@ -160,9 +165,8 @@ jobs:
     runs-on: [self-hosted, aws-ecs-16cpu-64mem-30m]
     strategy:
       fail-fast: false
-      matrix:
-        shard: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
-        shardTotal: [10]
+      # Update matrix to use fromJson with the new input
+      matrix: ${{ fromJson(inputs.matrix_config) }}
     timeout-minutes: 15
     steps:
       # Possibly this helps with GitHub-hosted runner network issues, but it's not confirmed