modify system libs step

Split the system libraries installation into separate steps for Ubuntu and macOS for better error handling
Added a retry mechanism for Homebrew installations on macOS
Added proper environment variable setup for jpeg on macOS
Removed the duplicate cache restore step
Added proper error handling with multiple attempts for package installation

The main improvements are in the "System Libraries (macOS)" step where we:

Update Homebrew first
Install packages one at a time with retry logic (up to 3 attempts)
Add proper waiting time between retries
Set up all the necessary environment variables for jpeg

.github/workflows/installation_test.yml

@@ -36,17 +36,45 @@ jobs:
           key: ${{ runner.os }}-R-${{ matrix.r-version }}-${{ hashFiles('**/DESCRIPTION') }}
           restore-keys: ${{ runner.os }}-R-${{ matrix.r-version }}-
 
-      - name: System Libraries
-        if: runner.os != 'Windows'
+      - name: System Libraries (Ubuntu)
+        if: matrix.os == 'ubuntu-latest'
         run: |
-          if [ "${{ matrix.os }}" == "ubuntu-latest" ]; then
-            sudo apt-get update
-            sudo apt-get install -y libfontconfig1-dev libudunits2-dev libcairo2-dev libcurl4-openssl-dev \
-                                    libharfbuzz-dev libfribidi-dev libfreetype6-dev libpng-dev libtiff5-dev \
-                                    libjpeg-dev libgdal-dev libgeos-dev libproj-dev
-          elif [ "${{ matrix.os }}" == "macOS-latest" ]; then
-            brew install freetype udunits cairo harfbuzz fribidi libpng libtiff jpeg gdal pkg-config
-          fi
+          sudo apt-get update
+          sudo apt-get install -y \
+            libfontconfig1-dev \
+            libudunits2-dev \
+            libcairo2-dev \
+            libcurl4-openssl-dev \
+            libharfbuzz-dev \
+            libfribidi-dev \
+            libfreetype6-dev \
+            libpng-dev \
+            libtiff5-dev \
+            libjpeg-dev \
+            libgdal-dev \
+            libgeos-dev \
+            libproj-dev
+
+      - name: System Libraries (macOS)
+        if: matrix.os == 'macOS-latest'
+        run: |
+          brew update
+          # Install dependencies one by one with retry mechanism
+          for pkg in freetype udunits cairo harfbuzz fribidi libpng libtiff jpeg gdal pkg-config; do
+            for i in {1..3}; do
+              if brew install $pkg; then
+                break
+              fi
+              echo "Attempt $i to install $pkg failed. Retrying..."
+              sleep 5
+            done
+          done
+          
+          # Set up environment variables for jpeg
+          echo 'export PATH="/opt/homebrew/opt/jpeg/bin:$PATH"' >> $GITHUB_ENV
+          echo 'export LDFLAGS="-L/opt/homebrew/opt/jpeg/lib"' >> $GITHUB_ENV
+          echo 'export CPPFLAGS="-I/opt/homebrew/opt/jpeg/include"' >> $GITHUB_ENV
+          echo 'export PKG_CONFIG_PATH="/opt/homebrew/opt/jpeg/lib/pkgconfig"' >> $GITHUB_ENV
 
       - name: Get latest tar.gz URL
         if: matrix.install-method == 'url'