ci/oss-fuzz: switch to Ubuntu 24.04

With
https://github.com/google/oss-fuzz/pull/14112 and
https://github.com/google/oss-fuzz/pull/14128,
we can now use Ubuntu 24.04. Let's bump the image version.

Note, the i386 build failure mentioned in the removed comment is related to
https://bugs.launchpad.net/ubuntu/+source/linux-signed-azure/+bug/2071445
https://github.com/actions/runner-images/issues/9977
and has been already fixed.

.github/workflows/cifuzz.yml

@@ -22,8 +22,7 @@ on:
       - main
 jobs:
   Fuzzing:
-    # FIXME: Figure out why 32-bit applications fail to run in docker on Ubuntu 24.04.
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     if: github.repository == 'systemd/systemd'
     concurrency:
       group: ${{ github.workflow }}-${{ matrix.sanitizer }}-${{ matrix.architecture }}-${{ github.ref }}

test/units/TEST-75-RESOLVED.sh

@@ -64,11 +64,13 @@ monitor_check_rr() (
 )
 
 restart_resolved() {
+    systemctl stop systemd-resolved-monitor.socket systemd-resolved-varlink.socket
     systemctl stop systemd-resolved.service
     (! systemctl is-failed systemd-resolved.service)
     # Reset the restart counter since we call this method a bunch of times
     # and can occasionally hit the default rate limit
     systemctl reset-failed systemd-resolved.service
+    systemctl start systemd-resolved-monitor.socket systemd-resolved-varlink.socket
     systemctl start systemd-resolved.service
 }
 
@@ -333,6 +335,7 @@ manual_testcase_02_mdns_llmnr() {
     } >/run/systemd/resolved.conf.d/90-mdns-llmnr.conf
     restart_resolved
     # make sure networkd is not running.
+    systemctl stop systemd-networkd.socket systemd-networkd-varlink.socket
     systemctl stop systemd-networkd.service
     assert_in 'no' "$(resolvectl mdns hoge)"
     assert_in 'no' "$(resolvectl llmnr hoge)"
@@ -1367,7 +1370,9 @@ testcase_15_wait_online_dns() {
     resolvectl domain dns0 ""
 
     # Stop systemd-resolved before calling systemd-networkd-wait-online. It should retry connections.
+    systemctl stop systemd-resolved-monitor.socket systemd-resolved-varlink.socket
     systemctl stop systemd-resolved.service
+    systemctl start systemd-resolved-monitor.socket systemd-resolved-varlink.socket
 
     # Begin systemd-networkd-wait-online --dns
     systemd-run -u "$unit" -p "Environment=SYSTEMD_LOG_LEVEL=debug" -p "Environment=SYSTEMD_LOG_TARGET=journal" --service-type=exec \