fix: mage installation with go1.18 (#33083)

* path for the mage with go1.18 has changed

* ci: test the command in the CI pipeline

* ci: set HOME

* new make goal to validate the mage installation

* unrequired path when using go install

Jenkinsfile

@@ -87,6 +87,10 @@ pipeline {
       steps {
         withGithubNotify(context: "Lint") {
           stageStatusCache(id: 'Lint'){
+            // test the ./dev-tools/run_with_go_ver used by the Unified Release process
+            dir("${BASE_DIR}") {
+              sh "HOME=${WORKSPACE} GO_VERSION=${GO_VERSION} ./dev-tools/run_with_go_ver make test-mage"
+            }
             withBeatsEnv(archive: false, id: "lint") {
               dumpVariables()
               whenTrue(env.ONLY_DOCS == 'false') {

Makefile

@@ -237,3 +237,7 @@ beats-dashboards: mage update
 build/distributions/dependencies.csv: $(PYTHON)
 	@mkdir -p build/distributions
 	$(PYTHON) dev-tools/dependencies-report --csv $@
+
+## test-mage : Test the mage installation used by the Unified Release process
+test-mage: mage
+	@mage dumpVariables

dev-tools/make/mage-install.mk

@@ -7,7 +7,7 @@ export MAGE_IMPORT_PATH
 mage:
 ifndef MAGE_PRESENT
 	@echo Installing mage $(MAGE_VERSION).
-	@go get -ldflags="-X $(MAGE_IMPORT_PATH)/mage.gitTag=$(MAGE_VERSION)" ${MAGE_IMPORT_PATH}@$(MAGE_VERSION)
+	@go install -ldflags="-X $(MAGE_IMPORT_PATH)/mage.gitTag=$(MAGE_VERSION)" ${MAGE_IMPORT_PATH}@$(MAGE_VERSION)
 	@-mage -clean
 endif
 	@true