chore: install Go 1.25.7 (#1596)

Signed-off-by: Oleksii Kurinnyi <okurinny@redhat.com>

Author: akurinnoy

.ci/oci.Dockerfile

@@ -15,8 +15,20 @@
 
 FROM registry.ci.openshift.org/openshift/release:rhel-9-release-golang-1.24-openshift-4.20
 
+ENV GO_VERSION=1.25.7
+ENV GOROOT=/usr/local/go
+ENV PATH=$GOROOT/bin:$PATH
+
 SHELL ["/bin/bash", "-c"]
 
+# Install Go 1.25.7 to satisfy go.mod toolchain requirement (go 1.25.0)
+RUN export ARCH="$(uname -m)" && if [[ ${ARCH} == "x86_64" ]]; then export ARCH="amd64"; elif [[ ${ARCH} == "aarch64" ]]; then export ARCH="arm64"; fi && \
+    curl -fsSL "https://go.dev/dl/go${GO_VERSION}.linux-${ARCH}.tar.gz" -o go.tar.gz && \
+    rm -rf /usr/local/go && \
+    tar -C /usr/local -xzf go.tar.gz && \
+    rm go.tar.gz
+RUN go version
+
 # Temporary workaround since mirror.centos.org is down and can be replaced with vault.centos.org
 RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo && sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/*.repo && sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/*.repo