ci: switch to ubuntu-latest where possible

Track ubuntu-latest where relevant and possible.
We can't update to ubuntu-latest when building and running BPF
selftests, though, because our QEMU image has too old of an GLIBC.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

.github/workflows/build.yml

@@ -53,7 +53,7 @@ jobs:
 
   ubuntu:
     runs-on: ubuntu-latest
-    name: Ubuntu Focal Build (${{ matrix.arch }})
+    name: Ubuntu Build (${{ matrix.arch }})
     strategy:
       fail-fast: false
       matrix:
@@ -75,7 +75,7 @@ jobs:
         if: matrix.arch != 'x86'
         with:
           distro:
-            ubuntu20.04
+            ubuntu22.04
           arch:
             ${{ matrix.arch }}
           setup:

.github/workflows/codeql.yml

@@ -17,7 +17,7 @@ permissions:
 jobs:
   analyze:
     name: Analyze
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     concurrency:
       group: ${{ github.workflow }}-${{ matrix.language }}-${{ github.ref }}
       cancel-in-progress: true

.github/workflows/pahole.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   vmtest:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     name: Kernel LATEST + staging pahole
     env:
       STAGING: tmp.master