build virtctl also for arm64

When we build on linux on amd64 we are already
building virtctl also for darwin and windows
OSs but still only for amd64.
But client architecture could differ the cluster ones.

kubectl for instance is shipped for linux, darwin
and windows in both amd64 and arm64 architectures.
Check as a reference:
- https://dl.k8s.io/release/v1.27.2/bin/linux/amd64/kubectl
- https://dl.k8s.io/release/v1.27.0/bin/linux/arm64/kubectl
- https://dl.k8s.io/release/v1.27.2/bin/darwin/amd64/kubectl
- https://dl.k8s.io/release/v1.27.2/bin/darwin/arm64/kubectl
- https://dl.k8s.io/release/v1.27.2/bin/windows/amd64/kubectl.exe
- https://dl.k8s.io/release/v1.27.2/bin/windows/arm64/kubectl.exe

Let's start taking the same approach for virtctl.

Signed-off-by: Simone Tiraboschi <[email protected]>

hack/build-go.sh

@@ -126,11 +126,14 @@ for arg in $args; do
             kubevirt::version::get_version_vars
             echo "$KUBEVIRT_GIT_VERSION" >${CMD_OUT_DIR}/${BIN_NAME}/.version
 
-            # build virtctl also for darwin and windows on amd64
+            # build virtctl also for darwin and windows and for arm64 when on amd64 on linux
             if [ "${BIN_NAME}" = "virtctl" -a "${ARCH}" = "amd64" -a -z "${LINUX_ONLY}" ]; then
                 GOOS=darwin GOARCH=amd64 go_build -tags "${KUBEVIRT_GO_BUILD_TAGS}" -o ${CMD_OUT_DIR}/${BIN_NAME}/${ARCH_BASENAME}-darwin-amd64 -ldflags "$(kubevirt::version::ldflags)" $(pkg_dir darwin amd64)
                 GOOS=windows GOARCH=amd64 go_build -tags "${KUBEVIRT_GO_BUILD_TAGS}" -o ${CMD_OUT_DIR}/${BIN_NAME}/${ARCH_BASENAME}-windows-amd64.exe -ldflags "$(kubevirt::version::ldflags)" $(pkg_dir windows amd64)
-                # Create symlinks to the latest binary of each architecture
+                GOOS=linux GOARCH=arm64 go_build -tags "${KUBEVIRT_GO_BUILD_TAGS}" -o ${CMD_OUT_DIR}/${BIN_NAME}/${ARCH_BASENAME}-linux-arm64 -ldflags "$(kubevirt::version::ldflags)" $(pkg_dir linux arm64)
+                GOOS=windows GOARCH=arm64 go_build -tags "${KUBEVIRT_GO_BUILD_TAGS}" -o ${CMD_OUT_DIR}/${BIN_NAME}/${ARCH_BASENAME}-windows-arm64.exe -ldflags "$(kubevirt::version::ldflags)" $(pkg_dir windows arm64)
+                GOOS=darwin GOARCH=arm64 go_build -tags "${KUBEVIRT_GO_BUILD_TAGS}" -o ${CMD_OUT_DIR}/${BIN_NAME}/${ARCH_BASENAME}-darwin-arm64 -ldflags "$(kubevirt::version::ldflags)" $(pkg_dir darwin arm64)
+                # Create symlinks to the latest binary of amd64 architecture
                 (cd ${CMD_OUT_DIR}/${BIN_NAME} && ln -sf ${ARCH_BASENAME}-darwin-amd64 ${BIN_NAME}-darwin)
                 (cd ${CMD_OUT_DIR}/${BIN_NAME} && ln -sf ${ARCH_BASENAME}-windows-amd64.exe ${BIN_NAME}-windows.exe)
             fi