use go version from builder image, instead of downloading in Dockerfile (#6996)

Signed-off-by: Adam D. Cornett <[email protected]>

Author: acornett21

images/operator-sdk/Dockerfile

@@ -19,17 +19,12 @@ RUN GOOS=linux GOARCH=$TARGETARCH make build/operator-sdk
 # Final image.
 FROM registry.access.redhat.com/ubi9/ubi-minimal:9.6
 
-# TODO: Figure out how to take the go binary from the builder image so this doesn't have to be maintained.
-ENV GO_VERSION=1.23.4
-
 ARG TARGETARCH
 RUN microdnf install -y make gcc which tar gzip
-RUN curl -sSLo /tmp/go.tar.gz https://golang.org/dl/go${GO_VERSION}.linux-${TARGETARCH}.tar.gz \
-	&& rm -rf /usr/local/go \
-	&& tar -C /usr/local -xzf /tmp/go.tar.gz \
-	&& ln -sf /usr/local/go/bin/* /usr/local/bin/ \
-	&& rm -f /tmp/go.tar.gz \
-	&& go version
+
+# Copy Go runtime from builder image
+COPY --from=builder /usr/local/go /usr/local/go
+RUN ln -sf /usr/local/go/bin/* /usr/local/bin/ && go version
 
 COPY --from=builder /workspace/build/operator-sdk /usr/local/bin/operator-sdk