Do a full bootstrap build in CI for the release

azure-pipelines.yml

           echo Executing Build and Tests
           reg add HKLM\SYSTEM\CurrentControlSet\Control\FileSystem /v LongPathsEnabled /t REG_DWORD /d 1 /f || exit 1
           python -m pip install pytest pytest-xdist || exit 1
-          python -u tools/ci.py -B download --cxx cl.exe -T tools\msvc.dds || exit 1
+          python -u tools/ci.py -B build -T tools\msvc.dds || exit 1
         displayName: Full CI
       - publish: _build/dds.exe
         artifact: DDS Executable - Windows VS2019
       - script: |
           set -eu
           sudo apt update -y
-          sudo apt install -y python3-minimal g++-9 ccache
+          sudo apt install -y python3-minimal g++-9 g++-8 ccache
           python3 -m pip install pytest pytest-xdist
         displayName: Prepare System
-      - script: python3 -u tools/ci.py -B download -T tools/gcc-9.dds
+      - script: python3 -u tools/ci.py -B build -T tools/gcc-9.dds
         displayName: Full CI
       - publish: _build/dds
         artifact: DDS Executable - Linux
       - script: |
           set -eu
           python3 -m pip install pytest pytest-xdist
-          python3 -u tools/ci.py -B download -T tools/gcc-9.dds
+          python3 -u tools/ci.py -B build -T tools/gcc-9.dds
         displayName: Build and Run Unit Tests
       - publish: _build/dds
         artifact: DDS Executable - macOS

tools/ci.py

 
 class CIOptions(NamedTuple):
     toolchain: str
-    skip_deps: bool
 
 
 def _do_bootstrap_build(opts: CIOptions) -> None: