xxx: try to use system protobuf to trigger absl fetch logic

Author: ingomueller-net

.github/workflows/build_test.yml

@@ -58,6 +58,7 @@ jobs:
           cmake -B build -G Ninja \
               -DCMAKE_BUILD_TYPE=Debug \
               -DBUILD_TZ_LIB=ON \
+              -DSUBSTRAIT_CPP_FIND_PROTOBUF_CONFIG=OFF \
               -DCMAKE_C_COMPILER_LAUNCHER=ccache \
               -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
 

scripts/setup-ubuntu.sh

@@ -19,15 +19,10 @@ sudo --preserve-env apt install -y \
   git \
   wget \
   clang-format-15 \
+  libprotobuf-dev \
+  protobuf-compiler \
   uuid-dev \
   default-jre \
   libcurl4-openssl-dev
 
-# Install the currently supported version of protobuf:
-PB_REL="https://github.com/protocolbuffers/protobuf/releases"
-PB_VER="28.2"
-curl -LO $PB_REL/download/v$PB_VER/protoc-$PB_VER-linux-x86_64.zip
-unzip protoc-$PB_VER-linux-x86_64.zip -d $HOME/.local
-export PATH="$PATH:$HOME/.local/bin"
-
 pip install cmake-format