Fix GTest installation in CI using libgtest-dev package and manual build

Co-authored-by: 0xrinegade <[email protected]>

Author: Copilot

.github/workflows/cpp_sdk.yml

@@ -69,15 +69,24 @@ jobs:
           echo "Using Clang compiler"
         }
     
-    - name: Install Google Test
+    - name: Install Google Test (Ubuntu)
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        sudo apt-get install -y libgtest-dev
+        cd /usr/src/gtest
+        sudo cmake .
+        sudo make
+        sudo cp lib/*.a /usr/lib
+    
+    - name: Install Google Test (macOS)
+      if: matrix.os == 'macos-latest'
       run: |
         git clone https://github.com/google/googletest.git
         cd googletest
         mkdir build && cd build
         cmake .. -DCMAKE_BUILD_TYPE=${{ matrix.build-type }}
         cmake --build . --config ${{ matrix.build-type }}
         sudo cmake --install . --config ${{ matrix.build-type }}
-      if: matrix.os != 'windows-latest'
     
     - name: Install Google Test (Windows)
       if: matrix.os == 'windows-latest'
@@ -154,12 +163,11 @@ jobs:
     
     - name: Install Google Test
       run: |
-        git clone https://github.com/google/googletest.git
-        cd googletest
-        mkdir build && cd build
-        cmake .. -DCMAKE_BUILD_TYPE=Debug
-        cmake --build . --config Debug
-        sudo cmake --install . --config Debug
+        sudo apt-get install -y libgtest-dev
+        cd /usr/src/gtest
+        sudo cmake .
+        sudo make
+        sudo cp lib/*.a /usr/lib
     
     - name: Configure with AddressSanitizer
       run: |
@@ -209,12 +217,11 @@ jobs:
     
     - name: Install Google Test
       run: |
-        git clone https://github.com/google/googletest.git
-        cd googletest
-        mkdir build && cd build
-        cmake .. -DCMAKE_BUILD_TYPE=Release
-        cmake --build . --config Release
-        sudo cmake --install . --config Release
+        sudo apt-get install -y libgtest-dev
+        cd /usr/src/gtest
+        sudo cmake .
+        sudo make
+        sudo cp lib/*.a /usr/lib
     
     - name: Configure
       run: |
@@ -242,7 +249,11 @@ jobs:
 
     - name: Install dependencies
       run: |
-        sudo apt-get install -y doxygen graphviz
+        sudo apt-get install -y doxygen graphviz libgtest-dev
+        cd /usr/src/gtest
+        sudo cmake .
+        sudo make
+        sudo cp lib/*.a /usr/lib
     
     - name: Generate documentation
       run: |