Fix lint: upgrade to support go1.22

golangci-lint supports go1.22 since v1.56.0, per golangci/golangci-lint#4273.

Switch to using Github Actions for lint check.

.github/workflows/golangci-lint.yaml

@@ -0,0 +1,29 @@
+name: golangci-lint
+on:
+  push:
+    branches:
+      - master
+      - release-0.31
+  pull_request:
+
+permissions:
+  contents: read
+
+env:
+  GO_VERSION: v1.22
+  GOLANGCI_LINT_VERSION: v1.56
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: ${{ env.GOLANGCI_LINT_VERSION }}
+          args: --verbose

.golangci.yaml

@@ -1,5 +1,5 @@
 run:
-  timeout: 3m
+  timeout: 5m
   skip-dirs:
   - vendor
 linters:

Makefile

@@ -33,7 +33,7 @@ endif
 GOOS ?= $(shell go env GOOS)
 GOARCH ?= $(shell go env GOARCH)
 INSTALL_LOCATION:=$(shell go env GOPATH)/bin
-GOLANGCI_LINT_VERSION ?= 1.54.0
+GOLANGCI_LINT_VERSION ?= 1.56.2
 GOSEC_VERSION ?= 2.13.1
 
 REGISTRY ?= gcr.io/$(shell gcloud config get-value project)