Bump Ruby image to 3.1 and Helm version to 3.9.4

Dockerfile.gitlab-charts-build-base-helm-3.9

@@ -0,0 +1,45 @@
+FROM ruby:3.1-alpine
+MAINTAINER GitLab Distribution Team
+
+ENV HELM_VERSION=3.9.4
+ENV HELM_URL=https://get.helm.sh/helm-v${HELM_VERSION}-linux-amd64.tar.gz
+ENV HELM_HOME=/root/.helm
+
+# kubectl (possibly in gcloud?)
+ENV KUBECTL_VERSION=1.26.7
+ENV KUBECTL_URL=https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VERSION}/bin/linux/amd64/kubectl
+
+ENV VCLUSTER_VERSION=0.16.3
+ENV VCLUSTER_URL=https://github.com/loft-sh/vcluster/releases/download/v${VCLUSTER_VERSION}/vcluster-linux-amd64
+
+# Install dependencies
+RUN apk --no-cache add -U openssl curl tar gzip bash ca-certificates git python3 py3-pip groff\
+  && mkdir -p /opt
+
+# Install kubectl
+RUN curl -L -o /usr/local/bin/kubectl ${KUBECTL_URL} \
+  && chmod +x /usr/local/bin/kubectl \
+  && kubectl version --client
+
+# Install Helm
+RUN wget -q -O - ${HELM_URL} | tar zxf - \
+    && mv linux-amd64/helm /usr/bin/ \
+    && chmod +x /usr/bin/helm \
+    && helm version --client
+
+# Install kubeval
+RUN mkdir -p $HELM_HOME/plugins && \
+    helm plugin install https://github.com/instrumenta/helm-kubeval
+
+# Install kubeconform
+ENV KUBECONFORM_HELM_VERSION=0.1.16
+RUN mkdir -p $HELM_HOME/plugins && \
+    helm plugin install https://github.com/jtyr/kubeconform-helm --version ${KUBECONFORM_HELM_VERSION}
+
+# Install aws cli
+RUN pip3 install awscli
+
+# Install vcluster
+RUN curl -L -o /usr/local/bin/vcluster ${VCLUSTER_URL} \
+  && chmod +x /usr/local/bin/vcluster \
+  && vcluster version