macOS: use conda in stead of mamba to install deps

In addition, enable libLAS to build with CMake version 4+.

Author: nilason

macos/build_grass_app.bash

@@ -37,7 +37,7 @@ conda_stable_file="${this_script_dir}/files/conda-requirements-stable-${arch}.tx
 conda_dev_file="${this_script_dir}/files/conda-requirements-dev-${arch}.txt"
 conda_req_file="$conda_stable_file"
 conda_temp_dir=$(mktemp -d -t GRASS)
-conda_bin="${conda_temp_dir}/bin/mamba"
+conda_bin="${conda_temp_dir}/bin/conda"
 conda_update_stable=0
 miniconda_url="https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-MacOSX-${arch}.sh"
 dmg_title=

macos/files/liblas-install.sh

@@ -96,6 +96,7 @@ LIBLAS_CONFIGURE_FLAGS="
   -DCMAKE_INSTALL_PREFIX=${PREFIX} \
   -DCMAKE_MACOSX_RPATH=ON \
   -DCMAKE_INSTALL_RPATH=${PREFIX} \
+  -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
   -DWITH_GEOTIFF=ON \
   -DGEOTIFF_INCLUDE_DIR=${PREFIX}/include \
   -DGEOTIFF_LIBRARY=${PREFIX}/lib/libgeotiff.dylib \