ci: upgrade builds to use Bazel 2.0.0 (#154)

Author: coryan

ci/etc/install-config.sh

@@ -15,7 +15,7 @@
 
 set -eu
 
-GOOGLE_CLOUD_CPP_BAZEL_VERSION="1.0.0"
+GOOGLE_CLOUD_CPP_BAZEL_VERSION="2.0.0"
 readonly GOOGLE_CLOUD_CPP_BAZEL_VERSION
 
 GOOGLE_CLOUD_CPP_CLOUD_SDK_VERSION="266.0.0"

ci/kokoro/windows/build.bat

@@ -12,6 +12,9 @@
 @REM See the License for the specific language governing permissions and
 @REM limitations under the License.
 
+REM Install Bazel using Chocolatey
+choco install -y bazel --version 2.0.0
+
 REM Configure the environment to use MSVC 2019 and then switch to PowerShell.
 call "c:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"