Update Docker base images

Followup after #1446

CUDA-10.2 and moreover CUDA-9.2 docker images are gone per [Nvidia's Container Support Policy](https://gitlab.com/nvidia/container-images/cuda/blob/master/doc/support-policy.md):
> After a period of Six Months time, the EOL tags WILL BE DELETED from Docker Hub and Nvidia GPU Cloud (NGC). This deletion ensures unsupported tags (and image layers) are not left lying around for customers to continue using after they have long been abandoned.

Author: malfet

conda/Dockerfile

@@ -1,6 +1,6 @@
 ARG CUDA_VERSION=10.2
 ARG BASE_TARGET=cuda${CUDA_VERSION}
-FROM nvidia/cuda:9.2-devel-centos7 as base
+FROM nvidia/cuda:11.4.3-devel-centos7 as base
 
 ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8

conda/build_docker.sh

@@ -5,11 +5,7 @@ set -eou pipefail
 export DOCKER_BUILDKIT=1
 TOPDIR=$(git rev-parse --show-toplevel)
 
-CUDA_VERSION=${CUDA_VERSION:-10.2}
-DEVTOOLSET_VERSION="9"
-if [[ ${CUDA_VERSION:0:2} == "10" ]]; then
-  DEVTOOLSET_VERSION="7"
-fi
+CUDA_VERSION=${CUDA_VERSION:-11.7}
 
 case ${CUDA_VERSION} in
   cpu)
@@ -32,7 +28,7 @@ esac
     --target final \
     --build-arg "BASE_TARGET=${BASE_TARGET}" \
     --build-arg "CUDA_VERSION=${CUDA_VERSION}" \
-    --build-arg "DEVTOOLSET_VERSION=${DEVTOOLSET_VERSION}" \
+    --build-arg "DEVTOOLSET_VERSION=9" \
     -t "pytorch/conda-builder:${DOCKER_TAG}" \
     -f "${TOPDIR}/conda/Dockerfile" \
     ${TOPDIR}

libtorch/Dockerfile

@@ -1,5 +1,5 @@
 ARG BASE_TARGET=base
-ARG GPU_IMAGE=nvidia/cuda:10.2-devel-ubuntu18.04
+ARG GPU_IMAGE=nvidia/cuda:11.4.3-devel-ubuntu18.04
 FROM ${GPU_IMAGE} as base
 
 ENV DEBIAN_FRONTEND=noninteractive

libtorch/build_docker.sh

@@ -15,13 +15,13 @@ case ${GPU_ARCH_TYPE} in
     cpu)
         BASE_TARGET=cpu
         DOCKER_TAG=cpu
-        GPU_IMAGE=nvidia/cuda:10.2-devel-ubuntu18.04
+        GPU_IMAGE=nvidia/cuda:11.4.3-devel-ubuntu18.04
         DOCKER_GPU_BUILD_ARG=""
         ;;
     cuda)
         BASE_TARGET=cuda${GPU_ARCH_VERSION}
         DOCKER_TAG=cuda${GPU_ARCH_VERSION}
-        GPU_IMAGE=nvidia/cuda:10.2-devel-ubuntu18.04
+        GPU_IMAGE=nvidia/cuda:11.4.3-devel-ubuntu18.04
         DOCKER_GPU_BUILD_ARG=""
         ;;
     rocm)