update to Go 1.18

This is the latest stable release and the one used by Kubernetes 1.24.

prow.sh

@@ -86,7 +86,7 @@ configvar CSI_PROW_BUILD_PLATFORMS "linux amd64 amd64; linux ppc64le ppc64le -pp
 # which is disabled with GOFLAGS=-mod=vendor).
 configvar GOFLAGS_VENDOR "$( [ -d vendor ] && echo '-mod=vendor' )" "Go flags for using the vendor directory"
 
-configvar CSI_PROW_GO_VERSION_BUILD "1.17.3" "Go version for building the component" # depends on component's source code
+configvar CSI_PROW_GO_VERSION_BUILD "1.18" "Go version for building the component" # depends on component's source code
 configvar CSI_PROW_GO_VERSION_E2E "" "override Go version for building the Kubernetes E2E test suite" # normally doesn't need to be set, see install_e2e
 configvar CSI_PROW_GO_VERSION_SANITY "${CSI_PROW_GO_VERSION_BUILD}" "Go version for building the csi-sanity test suite" # depends on CSI_PROW_SANITY settings below
 configvar CSI_PROW_GO_VERSION_KIND "${CSI_PROW_GO_VERSION_BUILD}" "Go version for building 'kind'" # depends on CSI_PROW_KIND_VERSION below
@@ -441,10 +441,7 @@ install_ginkgo () {
     if [ "v$(ginkgo version 2>/dev/null | sed -e 's/.* //')" = "${CSI_PROW_GINKGO_VERSION}" ]; then
         return
     fi
-    git_checkout https://github.com/onsi/ginkgo "$GOPATH/src/github.com/onsi/ginkgo" "${CSI_PROW_GINKGO_VERSION}" --depth=1 &&
-    # We have to get dependencies and hence can't call just "go build".
-    run_with_go "${CSI_PROW_GO_VERSION_GINKGO}" go get github.com/onsi/ginkgo/ginkgo || die "building ginkgo failed" &&
-    mv "$GOPATH/bin/ginkgo" "${CSI_PROW_BIN}"
+    run_with_go "${CSI_PROW_GO_VERSION_GINKGO}" env GOBIN="${CSI_PROW_BIN}" go install "github.com/onsi/ginkgo/ginkgo@${CSI_PROW_GINKGO_VERSION}" || die "building ginkgo failed"
 }
 
 # Ensure that we have the desired version of dep.

verify-spelling.sh

@@ -41,7 +41,7 @@ if [[ -z "$(command -v misspell)" ]]; then
   # perform go get in a temp dir as we are not tracking this version in a go module
   # if we do the go get in the repo, it will create / update a go.mod and go.sum
   cd "${TMP_DIR}"
-  GO111MODULE=on GOBIN="${TMP_DIR}" go get "github.com/client9/misspell/cmd/misspell@${TOOL_VERSION}"
+  GO111MODULE=on GOBIN="${TMP_DIR}" go install "github.com/client9/misspell/cmd/misspell@${TOOL_VERSION}"
   export PATH="${TMP_DIR}:${PATH}"
 fi