Add Fedora 42 to CI

42 works fine.
rawhide fails to load ebpf path probes, these are nightly build fedora images
and don't belong in CI anyway, still it's useful to have it in the script.

Author: haesbaert

.buildkite/pipeline.yml

@@ -191,3 +191,14 @@ steps:
       provider: gcp
       machineType: n2-standard-2
       enableNestedVirtualization: true
+
+  - label: "quark-test on fedora 42(beta)"
+    key: test_fedora_42
+    command: "./.buildkite/runtest_fedora.sh 42"
+    depends_on:
+      - make_docker
+    agents:
+      image: family/core-ubuntu-2204
+      provider: gcp
+      machineType: n2-standard-2
+      enableNestedVirtualization: true

krun-fedora.sh

@@ -19,9 +19,10 @@ FEDORAVER="$2"
 shift 2
 
 case $FEDORAVER in
-2?|3?)	URL="https://archives.fedoraproject.org/pub/archive/fedora/linux/updates/$FEDORAVER/Everything/x86_64/Packages/k";;
-4?)	URL="http://ftp.fau.de/fedora/linux/updates/$FEDORAVER/Everything/x86_64/Packages/k";;
-*)	echo bad version "$FEDORAVER" 1>&2
+2?|3?)		URL="https://archives.fedoraproject.org/pub/archive/fedora/linux/updates/$FEDORAVER/Everything/x86_64/Packages/k";;
+42|rawhide)	URL="http://ftp.fau.de/fedora/linux/development/$FEDORAVER/Everything/x86_64/os/Packages/k";;
+4?)		URL="http://ftp.fau.de/fedora/linux/updates/$FEDORAVER/Everything/x86_64/Packages/k";;
+*)		echo bad version "$FEDORAVER" 1>&2
 esac
 
 TMPDIR=$(mktemp -d "/tmp/$SCRIPT.XXXXXXXXXX")