chore(): Shard unit tests jobs (medusajs#13525)

* chore(): Shard unit tests jobs

* pass with no tests

* try artifacts

* Revert "try artifacts"

This reverts commit 43663b4.

Author: adrien2p

.github/workflows/action.yml

@@ -39,11 +39,14 @@ jobs:
         with:
           extension: pipeline
 
-  unit-tests:
+  unit-tests-matrix:
     needs: setup
+    name: Unit Tests - Shard ${{ matrix.shard_index }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: true
+      matrix:
+        shard_index: [1, 2, 3]
     env:
       TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
       TURBO_TEAM: ${{ secrets.TURBO_TEAM }}
@@ -63,7 +66,22 @@ jobs:
           extension: pipeline
 
       - name: Run unit tests
-        run: yarn test:chunk -- --maxWorkers=${{ steps.cpu-cores.outputs.count }}
+        run: yarn test:chunk -- --shard=${{ matrix.shard_index }}/3 --maxWorkers=${{ steps.cpu-cores.outputs.count }} --passWithNoTests
+
+  unit-tests:
+    if: ${{ always() }}
+    runs-on: ubuntu-latest
+    needs: unit-tests-matrix
+    steps:
+      - run: exit 1
+        if: >-
+          ${{
+               contains(needs.unit-tests-matrix.result, 'failure')
+            || contains(needs.unit-tests-matrix.result, 'cancelled')
+            || contains(needs.unit-tests-matrix.result, 'skipped')
+          }}
+      - run: exit 0
+        if: ${{ contains(needs.unit-tests-matrix.result, 'success') }}
 
   integration-tests-packages-matrix:
     needs: setup