ci: Update the GitHub Ubuntu runner image to Ubuntu 22.04.

Updating this image is a requirement for the kernel system-traffic
tests to pass on Ubuntu. In addition, 20.04 might be replaced,
as soon as 24.04 comes out. Or we need to do this when it becomes
EOL in April 2025.

In addition we also bumped the AF_XDP test kernel to v5.4 to
make it compile with the later GCC version included in Ubuntu 22.04.

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Acked-by: Simon Horman <horms@ovn.org>

.github/workflows/build-and-test.yml

@@ -23,7 +23,7 @@ jobs:
       TESTSUITE:   ${{ matrix.testsuite }}
 
     name: linux ${{ join(matrix.*, ' ') }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     timeout-minutes: 30
 
     strategy:
@@ -72,10 +72,10 @@ jobs:
 
           - compiler:     gcc
             afxdp:        afxdp
-            kernel:       5.3
+            kernel:       5.4
           - compiler:     clang
             afxdp:        afxdp
-            kernel:       5.3
+            kernel:       5.4
 
           - compiler:     gcc
             dpdk:         dpdk