ci(test): upload playwright artifacts seperately (#59496)

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Updating snapshot upload location per suggestion at
#59469 (comment)

Closes PACK-2132

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Co-authored-by: Leah <8845940+ForsakenHarmony@users.noreply.github.com>

.github/workflows/build_reusable.yml

@@ -178,7 +178,16 @@ jobs:
         with:
           name: test-reports
           path: |
-            test/traces
             test/test-junit-report
             test/turbopack-test-junit-report
           if-no-files-found: ignore
+
+      # upload playwright snapshots from failed tests
+      - name: Upload test report artifacts
+        uses: actions/upload-artifact@v3
+        if: ${{ inputs.afterBuild && always() }}
+        with:
+          name: test-playwright-snapshots
+          path: |
+            test/traces
+          if-no-files-found: ignore