Gather migration hooks logs

[aufi]

A VM migration can include pre and post migration hooks which are Jobs (k8s resources) that could contain relevant information in their log files. Adding migration hooks jobs logs to the targeted gathering.

Addresses #45 and fixes https://bugzilla.redhat.com/show_bug.cgi?id=2059335

[aufi]

Jobs CRs and pod logs with their execution outputs are now part of the must-gather archive.

Image for testing: quay.io/maufart/forklift-must-gather:hook-logs

$ oc adm must-gather --image quay.io/maufart/forklift-must-gather:hook-logs -- PLAN=<PLAN_NAME> /usr/bin/targeted

Example output:

...
[must-gather-bmb7j] POD 2022-03-02T12:48:39.759689806Z Targeted gathering for Forklift in namespaces [openshift-mtv]
[must-gather-bmb7j] POD 2022-03-02T12:48:39.764206688Z Targeted gathering for Plan: plan2j
[must-gather-bmb7j] POD 2022-03-02T12:48:39.975084768Z Gathering plans..
[must-gather-bmb7j] POD 2022-03-02T12:48:39.975084768Z Dumping plan: plan2j from openshift-mtv
[must-gather-bmb7j] POD 2022-03-02T12:48:40.103606106Z Gathering virtualmachines..
[must-gather-bmb7j] POD 2022-03-02T12:48:40.398411067Z Dumping datavolume: plan2j-vm-3696-fb424 from mdest2
[must-gather-bmb7j] POD 2022-03-02T12:48:40.580650231Z Dumping virtualmachine: maufart-centos-13 from mdest2
[must-gather-bmb7j] POD 2022-03-02T12:48:43.309469648Z Dumping job: plan2j-vm-3696-posthook-4mx85 from openshift-mtv
[must-gather-bmb7j] POD 2022-03-02T12:48:43.624831099Z Dumping job: plan2j-vm-3696-prehook-mwqnl from openshift-mtv
[must-gather-bmb7j] POD 2022-03-02T12:48:43.952179873Z Condition for targeted logs filtering:
[must-gather-bmb7j] POD 2022-03-02T12:48:43.954873968Z openshift-migration\/plan2j|maufart-centos-13
[must-gather-bmb7j] POD 2022-03-02T12:48:43.957027117Z Gathering logs for namespaces [openshift-mtv]
...
[must-gather-bmb7j] POD 2022-03-02T12:48:46.744625505Z [ns=openshift-mtv][job=plan2j-vm-3696-posthook-4mx85--1-92b5z] Collecting migration hook job's pod logs...
[must-gather-bmb7j] POD 2022-03-02T12:48:47.785087080Z [ns=openshift-mtv][job=plan2j-vm-3696-prehook-mwqnl--1-bsr47] Collecting migration hook job's pod logs...
...