pan:config in default is broken

[lumpymilk]

Describe the bug

transforms.conf for extract_config is wrong for the default format. There was a misinterpretation on the format where two fields are not typically part of the event. Before Change Detail fields are ONLY in CUSTOM logs.

The format for pan:config syslog specifically says the Change Detail fields will only appear in custom logs:
https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/monitoring/use-syslog-for-monitoring/syslog-field-descriptions/config-log-fields

Before Change Detail (before-change-detail)	This field is in custom logs only; it is not in the default format.It contains the full xpath before the configuration change.
After Change Detail (after-change-detail)	This field is in custom logs only; it is not in the default format.It contains the full xpath after the configuration change.

The fields do not normally appear. This throws off the whole DELIMS process.
The documentation says:
Format: FUTURE_USE, Receive Time, Serial Number, Type, Subtype, FUTURE_USE, Generated Time, Host, Virtual System, Command, Admin, Client, Result, Configuration Path, Before Change Detail, After Change Detail, Sequence Number, Action Flags, Device Group Hierarchy Level 1, Device Group Hierarchy Level 2, Device Group Hierarchy Level 3, Device Group Hierarchy Level 4, Virtual System Name, Device Name, Device Group, Audit Comment
but it also specifies that these additional fields are "not in the default format"

We expect the format of the following instead
Format: FUTURE_USE, Receive Time, Serial Number, Type, Subtype, FUTURE_USE, Generated Time, Host, Virtual System, Command, Admin, Client, Result, Configuration Path,Sequence Number, Action Flags, Device Group Hierarchy Level 1, Device Group Hierarchy Level 2, Device Group Hierarchy Level 3, Device Group Hierarchy Level 4, Virtual System Name, Device Name, Device Group, Audit Comment

FIELDS = "future_use1","receive_time","serial_number","log_type","log_subtype","future_use2","generated_time","host_name","vsys","command","admin","client","result","configuration_path","sequence_number","action_flags","devicegroup_level1","devicegroup_level2","devicegroup_level3","devicegroup_level4","vsys_name","dvc_name"