ci/gha: switch some jobs to ubuntu-22.04

This is a partial backport of commits 953e1cc48 and b32655d2
from the main branch.

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

.github/workflows/test.yml

@@ -99,7 +99,7 @@ jobs:
   # However, we do not have 32-bit ARM CI, so we use i386 for testing 32bit stuff.
   # We are not interested in providing official support for i386.
   cross-i386:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
 
@@ -113,9 +113,6 @@ jobs:
         sudo add-apt-repository -y ppa:criu/ppa
         # apt-add-repository runs apt update so we don't have to.
 
-        # Due to a bug in apt, we have to update it first
-        # (see https://bugs.launchpad.net/ubuntu-cdimage/+bug/1871268)
-        sudo apt -q install apt
         sudo apt -q install libseccomp-dev libseccomp-dev:i386 gcc-multilib criu
 
     - name: install go

.github/workflows/validate.yml

@@ -19,7 +19,7 @@ jobs:
       run: make validate-keyring
 
   lint:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with:
@@ -42,7 +42,7 @@ jobs:
           golangci-lint run --config .golangci-extra.yml --new-from-rev=HEAD~1 --out-format=github-actions
 
   compile-buildtags:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     env:
       # Don't ignore C warnings. Note that the output of "go env CGO_CFLAGS" by default is "-g -O2", so we keep them.
       CGO_CFLAGS: -g -O2 -Werror
@@ -56,7 +56,7 @@ jobs:
         run: make BUILDTAGS=""
 
   codespell:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - name: install deps
@@ -66,14 +66,14 @@ jobs:
       run: codespell
 
   shfmt:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - name: shfmt
       run: make shfmt
 
   shellcheck:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - name: vars
@@ -98,7 +98,7 @@ jobs:
         run : ./script/check-config.sh
 
   deps:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - name: install go
@@ -110,7 +110,7 @@ jobs:
 
 
   commit:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     # Only check commits on pull requests.
     if: github.event_name == 'pull_request'
     steps:
@@ -128,7 +128,7 @@ jobs:
           error: 'Subject too long (max 72)'
 
   cfmt:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: checkout
       uses: actions/checkout@v4
@@ -145,7 +145,7 @@ jobs:
 
 
   release:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: checkout
       uses: actions/checkout@v4