Update to Ubuntu 24.04, GRASS GIS branch for 8.4 (#76)

Update to Ubuntu 24.04, GRASS GIS branch for 8.4. Test only the supported branch and PPA, but not old branch (there is not pre-release branch at this point).

Also remove unused dependencies and code for GRASS GIS v7.8.

.github/workflows/apt.txt

@@ -5,10 +5,7 @@ libbz2-dev
 libcairo-dev
 libfftw3-dev
 libgdal-dev
-libgl1-mesa-dev
-libglu1-mesa-dev
 libnetcdf-dev
-libopenblas-dev
 libpng-dev
 libproj-dev
 libreadline-dev

.github/workflows/build.sh

@@ -35,8 +35,6 @@ cd grass
     --with-cxx \
     --with-zstd \
     --with-bzlib \
-    --with-blas \
-    --with-lapack \
     --with-readline \
     --with-openmp \
     --with-pthread \
@@ -48,6 +46,7 @@ cd grass
     --with-sqlite \
     --with-fftw \
     --with-netcdf \
+    --without-opengl \
     --without-pdal
 
 make

.github/workflows/ci-compiled.yml

@@ -22,14 +22,10 @@ jobs:
       matrix:
         include:
         - version: main
-          command: grass
-        - version: releasebranch_8_2
-          command: grass
-        - version: releasebranch_8_0
-          command: grass
+        - version: releasebranch_8_4
       fail-fast: false
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
     - uses: actions/checkout@v1
@@ -61,11 +57,6 @@ jobs:
     - name: Add the bin directory to PATH
       run: |
         echo "$HOME/install/bin" >> $GITHUB_PATH
-    - name: Make simple grass command available
-      run: |
-        if [ ! -f "$HOME/install/bin/grass" ]; then
-          ln -s "$HOME/install/bin/${{ matrix.command }}" "$HOME/install/bin/grass"
-        fi
     - name: Get GRASS GIS version
       run: |
         grass --version
@@ -78,10 +69,6 @@ jobs:
       with:
         path: nc_spm_08_grass7
         key: ${{ runner.os }}-nc_spm_08_grass7
-    - name: Get data download tool for v7 (g.download.location)
-      if: steps.cache-nc_spm_08_grass7.outputs.cache-hit != 'true' && matrix.version == 'releasebranch_7_8'
-      run: |
-        grass --tmp-location XY --exec g.extension g.download.location --verbose
     - name: Get sample data for testing (NC SPM sample location)
       if: steps.cache-nc_spm_08_grass7.outputs.cache-hit != 'true'
       run: |