Add CUDA 11.8 CI config

ci/matrix.yml

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-cuda_oldest: &cuda_oldest '12.2'
+cuda_oldest: &cuda_oldest '11.8'
 cuda_newest: &cuda_newest '12.2'
 
 # The GPUs to test on
@@ -23,7 +23,7 @@ gpus:
   - 'v100'
 
 # The version of the devcontainer images to use from https://hub.docker.com/r/rapidsai/devcontainers
-devcontainer_version: '23.10'
+devcontainer_version: '23.12'
 
 # Each environment below will generate a unique build/test job
 # See the "compute-matrix" job in the workflow for how this is parsed and used
@@ -42,5 +42,6 @@ devcontainer_version: '23.10'
 # Configurations that will run for every PR
 pull_request:
   nvcc:
+    - {cuda: *cuda_oldest, os: 'ubuntu22.04', cpu: 'amd64', compiler: {name: 'gcc', version: '11', exe: 'g++'}, gpu_build_archs: '70', std: [17], jobs: ['build', 'test']}
     - {cuda: *cuda_newest, os: 'ubuntu22.04', cpu: 'amd64', compiler: {name: 'gcc', version: '12', exe: 'g++'}, gpu_build_archs: '70', std: [17], jobs: ['build', 'test']}
     - {cuda: *cuda_newest, os: 'ubuntu22.04', cpu: 'arm64', compiler: {name: 'gcc', version: '12', exe: 'g++'}, gpu_build_archs: '60,90', std: [17], jobs: ['build']}