[ci] add kcov tool for linux package integration tests coverage

Signed-off-by: Vitalii Koshura <lestat.de.lionkur@gmail.com>

.codecov.yml

@@ -1,7 +1,7 @@
 codecov:
   require_ci_to_pass: true
   notify:
-    after_n_builds: 3
+    after_n_builds: 4
     wait_for_ci: true
 
 coverage:
@@ -19,7 +19,7 @@ comment:
   require_head: true       # [true :: must have a head report to post]
   branches:
     - master
-  after_n_builds: 3
+  after_n_builds: 4
 
 github_checks:
     annotations: false

.github/workflows/linux-package.yml

@@ -750,10 +750,31 @@ jobs:
           apt install -y $(find ./ -type f -name "boinc-manager*.deb" -printf "%p\n")
 
       - name: Run integration tests
-        if: success()
+        if: success() && !(matrix.os == 'focal' && matrix.type == 'install')
         run: |
           python3 ./tests/linux_package_tests/integration_tests.py
 
+      - name: Install kcov
+        if: success() && matrix.os == 'focal' && matrix.type == 'install'
+        run: |
+          apt install -y software-properties-common
+          add-apt-repository "deb http://archive.ubuntu.com/ubuntu focal universe"
+          apt update -qq
+          apt install -y kcov
+
+      - name: Run integration tests with kcov
+        if: success() && matrix.os == 'focal' && matrix.type == 'install'
+        run: |
+          kcov ./coverage python3 ./tests/linux_package_tests/integration_tests.py
+
+      - name: Upload coverage report
+        if: success() && matrix.os == 'focal' && matrix.type == 'install'
+        uses: codecov/codecov-action@e28ff129e5465c2c0dcc6f003fc735cb6ae0c673
+        with:
+          directory: ./coverage/
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
   test-fedora-rpm-package:
     name: Test Fedora RPM Package
     runs-on: ubuntu-latest