Add amazonlinux (x86/arm) dockerfile (#20320)

Co-authored-by: Christian Kniep <kniec@amazon.com>

share/spack/docker/amazonlinux-2.dockerfile

@@ -0,0 +1,70 @@
+FROM public.ecr.aws/amazonlinux/amazonlinux:2.0.20201111.0
+MAINTAINER Spack Maintainers <maintainers@spack.io>
+
+ENV DOCKERFILE_BASE=centos            \
+    DOCKERFILE_DISTRO=centos          \
+    DOCKERFILE_DISTRO_VERSION=7       \
+    SPACK_ROOT=/opt/spack             \
+    DEBIAN_FRONTEND=noninteractive    \
+    CURRENTLY_BUILDING_DOCKER_IMAGE=1 \
+    container=docker
+
+RUN yum update -y \
+ && yum groupinstall -y "Development Tools" \
+ && yum install -y \
+        curl \
+        findutils \
+        gcc-c++ \
+        gcc \
+        gcc-gfortran \
+        git \
+        gnupg2 \
+        hostname \
+        iproute \
+        Lmod \
+        make \
+        patch \
+        python \
+        python-pip \
+        python-setuptools \
+        tcl \
+        unzip \
+        which \
+ && pip install boto3 \
+ && rm -rf /var/cache/yum \
+ && yum clean all
+
+COPY bin   $SPACK_ROOT/bin
+COPY etc   $SPACK_ROOT/etc
+COPY lib   $SPACK_ROOT/lib
+COPY share $SPACK_ROOT/share
+COPY var   $SPACK_ROOT/var
+RUN mkdir -p $SPACK_ROOT/opt/spack
+
+RUN ln -s $SPACK_ROOT/share/spack/docker/entrypoint.bash \
+          /usr/local/bin/docker-shell \
+ && ln -s $SPACK_ROOT/share/spack/docker/entrypoint.bash \
+          /usr/local/bin/interactive-shell \
+ && ln -s $SPACK_ROOT/share/spack/docker/entrypoint.bash \
+          /usr/local/bin/spack-env
+
+RUN mkdir -p /root/.spack \
+ && cp $SPACK_ROOT/share/spack/docker/modules.yaml \
+        /root/.spack/modules.yaml \
+ && rm -rf /root/*.* /run/nologin $SPACK_ROOT/.git
+
+# [WORKAROUND]
+# https://superuser.com/questions/1241548/
+#     xubuntu-16-04-ttyname-failed-inappropriate-ioctl-for-device#1253889
+RUN [ -f ~/.profile ]                                               \
+ && sed -i 's/mesg n/( tty -s \\&\\& mesg n || true )/g' ~/.profile \
+ || true
+
+WORKDIR /root
+SHELL ["docker-shell"]
+
+# TODO: add a command to Spack that (re)creates the package cache
+RUN spack spec hdf5+mpi
+
+ENTRYPOINT ["/bin/bash", "/opt/spack/share/spack/docker/entrypoint.bash"]
+CMD ["interactive-shell"]