PMM-13540 Fix pmm client v3 build for nomad. (#3298)

* PMM-13540 Fix pmm client v3 build for nomad.

build/scripts/build-client-binary

@@ -19,6 +19,21 @@ gobuild_component() {
     local component_path=$4
     local result_file=${5:-bin/$(basename ${component_path:-$extract_path})}
 
+    # Set target for Nomad accordingly
+    local target
+    case "$(uname -m)" in
+        x86_64)
+            target="linux_amd64"
+            ;;
+        aarch64)
+            target="linux_arm64"
+            ;;
+        *)
+            echo "Unsupported architecture: $(uname -m)"
+            exit 1
+            ;;
+    esac
+
     if [ ${component} = 'azure_metrics_exporter' ]; then
         result_file=${result_file/_metrics/}
     fi
@@ -38,7 +53,7 @@ gobuild_component() {
     elif [ ${component} = 'percona-toolkit' ]; then
         build_command="cd /tmp/go/src/${extract_path}/${component_path} && go build -o \${binary_dir}/${result_file} ."
     elif [ ${component} = 'nomad' ]; then
-        build_command="cd /tmp/go/src/${extract_path} && TARGETS=linux_amd64 make deps release"
+        build_command="cd /tmp/go/src/${extract_path} && TARGETS=${target} make deps release"
     else
         build_command="go build -o \${binary_dir}/${result_file} ./src/${extract_path}/${component_path}"
     fi
@@ -130,7 +145,7 @@ main() {
     gobuild_component "percona-toolkit" "" "github.com/percona/percona-toolkit" "src/go/pt-mongodb-summary"
     gobuild_component "percona-toolkit" "" "github.com/percona/percona-toolkit" "src/go/pt-pg-summary"
 
-    cp -r ${tmp_dir}/go/src/github.com/hashicorp/nomad/pkg/linux_amd64/nomad ${binary_dir}/bin/nomad
+    cp -r ${tmp_dir}/go/src/github.com/hashicorp/nomad/pkg/linux_*/nomad ${binary_dir}/bin/nomad
 
     rm -rf ${binary_tarball}
     mkdir -p $(dirname ${binary_tarball}) || :