chore: split codecov jobs (#9748)

Signed-off-by: Charles-Edouard Brétéché <charles.edouard@nirmata.com>

.github/workflows/codecov.yaml

@@ -18,7 +18,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  codecov:
+  unit-tests:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
@@ -36,6 +36,25 @@ jobs:
         free-disk-space: false
     - name: Generate Code Coverage Report
       run: make code-cov-report
+    - name: Upload coverage
+      uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3.1.3
+      with:
+        name: coverage.out
+        path: coverage.out
+        retention-days: 1
+        if-no-files-found: error
+
+  upload-to-codecov:
+    needs:
+    - unit-tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+    - name: Download coverage
+      uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a # v3.0.2
+      with:
+        name: coverage.out
     - name: Upload Report to Codecov
       uses: codecov/codecov-action@e0b68c6749509c5f83f984dd99a76a1c1a231044 # v4.0.1
       with: