Enable systemd_sink tests in linux pipeline (#2669)

* Install libsystemd-dev in linux pipeline

Without this package the test_systemd_sink.cpp will not be tested.

* Install pkg-config in linux pipeline

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
       - uses: actions/checkout@main
       - name: Setup
         run: |
-          apt-get update && apt-get install -y curl git
+          apt-get update && apt-get install -y curl git pkg-config libsystemd-dev
           CMAKE_VERSION="3.24.2"
           curl -sSL https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-linux-x86_64.sh -o install-cmake.sh
           chmod +x install-cmake.sh