ci/gha: add Go 1.23, drop 1.21

- drop Go 1.21;
- add Go 1.23;
- for a few jobs that were using Go 1.21, switch to 1.22;

Also, bump go to 1.22 in go.mod.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

.cirrus.yml

@@ -77,7 +77,7 @@ task:
   env:
     HOME: /root
     CIRRUS_WORKING_DIR: /home/runc
-    GO_VERSION: "1.21"
+    GO_VERSION: "1.22"
     BATS_VERSION: "v1.9.0"
     RPMS: gcc git iptables jq glibc-static libseccomp-devel make criu fuse-sshfs container-selinux
     # yamllint disable rule:key-duplicates

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, ubuntu-24.04, actuated-arm64-6cpu-8gb]
-        go-version: [1.21.x, 1.22.x]
+        go-version: [1.22.x, 1.23.x]
         rootless: ["rootless", ""]
         race: ["-race", ""]
         criu: ["", "criu-dev"]
@@ -33,7 +33,7 @@ jobs:
           # Disable most of criu-dev jobs, as they are expensive
           # (need to compile criu) and don't add much value/coverage.
           - criu: criu-dev
-            go-version: 1.21.x
+            go-version: 1.22.x
           - criu: criu-dev
             rootless: rootless
           - criu: criu-dev
@@ -45,12 +45,12 @@ jobs:
           - dmz: runc_nodmz
             os: ubuntu-20.04
           - dmz: runc_nodmz
-            go-version: 1.21.x
+            go-version: 1.22.x
           - dmz: runc_nodmz
             rootless: rootless
           - dmz: runc_nodmz
             race: -race
-          - go-version: 1.21.x
+          - go-version: 1.22.x
             os: actuated-arm64-6cpu-8gb
           - race: "-race"
             os: actuated-arm64-6cpu-8gb

go.mod

@@ -1,6 +1,6 @@
 module github.com/opencontainers/runc
 
-go 1.21
+go 1.22
 
 require (
 	github.com/checkpoint-restore/go-criu/v6 v6.3.0