tetragon: on bugtool dump systemd and journal info

[tixxdz]

[kkourt]

Failure is:

 --- FAIL: TestNamespacedPolicies (0.00s)
    logcapture.go:25: time="2024-03-14T23:41:13Z" level=info msg="Supported cgroup controller 'memory' is active on the system" cgroup.controller.hierarchyID=9 cgroup.controller.index=4 cgroup.controller.name=memory cgroup.fs=/sys/fs/cgroup
    logcapture.go:25: time="2024-03-14T23:41:13Z" level=info msg="Supported cgroup controller 'pids' is active on the system" cgroup.controller.hierarchyID=13 cgroup.controller.index=11 cgroup.controller.name=pids cgroup.fs=/sys/fs/cgroup
    logcapture.go:25: time="2024-03-14T23:41:13Z" level=info msg="Supported cgroup controller 'cpuset' is active on the system" cgroup.controller.hierarchyID=8 cgroup.controller.index=0 cgroup.controller.name=cpuset cgroup.fs=/sys/fs/cgroup
    logcapture.go:25: time="2024-03-14T23:41:13Z" level=warning msg="Detection of deployment mode failed" confmap-update=tg_conf_map error="detect deployment mode failed, could not parse process cgroup paths"
    logcapture.go:25: time="2024-03-14T23:41:13Z" level=warning msg="Deployment mode is unknown, advanced Cgroups tracking will be disabled" confmap-update=tg_conf_map
    policyfilter_test.go:113: 
        	Error Trace:	/home/runner/work/tetragon/tetragon/go/src/github.com/cilium/tetragon/pkg/sensors/tracing/policyfilter_test.go:113
        	Error:      	Received unexpected error:
        	            	detect deployment mode failed, could not parse process cgroup paths
        	Test:       	TestNamespacedPolicies
FAIL