Bump Go version to 1.21.1 (#10377)

* Bump Go version to 1.21.1

* Bump testrunner image

.github/workflows/ci.yaml

@@ -62,23 +62,7 @@ jobs:
               - 'charts/ingress-nginx/**/*'
               - 'NGINX_BASE'
 
-
-  security:
-    runs-on: ubuntu-latest
-    steps:
-
-      - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
-
-      - name: Run Gosec Security Scanner
-        uses: securego/gosec@a89e9d5a7acb4457f3891ac18532b142b1bf9221 # v2.17.0
-        with:
-          # G601 for zz_generated.deepcopy.go
-          # G306 TODO: Expect WriteFile permissions to be 0600 or less
-          # G307 TODO: Deferring unsafe method "Close"
-          args: -exclude=G109,G601,G104,G204,G304,G306,G307 -tests=false -exclude-dir=test -exclude-dir=images/  -exclude-dir=docs/ ./...
-
-  gofmt:
+    gofmt:
     runs-on: ubuntu-latest
     needs: changes
     if: |
@@ -91,7 +75,7 @@ jobs:
         id: go
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
 
       - name: Run go-fmt
@@ -110,7 +94,7 @@ jobs:
         id: go
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
 
       - name: Run test
@@ -131,7 +115,7 @@ jobs:
         id: go
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
 
       - name: Set up QEMU
@@ -195,7 +179,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
 
       - name: cache
@@ -502,7 +486,7 @@ jobs:
         if: ${{ steps.filter-images.outputs.kube-webhook-certgen == 'true' }}
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
 
       - name: kube-webhook-certgen image build

.github/workflows/golangci-lint.yml

@@ -25,7 +25,7 @@ jobs:
         id: go
         uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
       
       - name: golangci-lint

.github/workflows/plugin.yaml

@@ -22,7 +22,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.20'
+          go-version: '1.21.1'
           check-latest: true
 
       - name: Run GoReleaser