[fluentd] request ids are not always present so are handled incorrectly when logs are passed

[Matt Crees]

The format1 regex for extracting info out of the logs does not match on some logs:
https://github.com/openstack/kolla-ansible/blob/d6844dc8958792d900663c1c51d18cd9d7b50390/ansible/roles/common/templates/conf/input/00-global.conf.j2#L19

This part of the regex assumes the request id will follow a string:

\[(\S+ req-)?((?<request_id>\S+)

This is not always the case. Has been seen in logs from Nova Compute.

There is no request id:

2023-11-14 20:46:33 +0000 [warn]: #0 pattern not matched: "2023-11-14 20:46:33.922 7 ERROR nova.compute.manager [instance: 341b46
c8-1584-42b7-a866-2b1fe1fde093] Traceback (most recent call last):"

2023-11-14 20:46:33 +0000 [warn]: #0 pattern not matched: "2023-11-14 20:46:33.922 7 ERROR nova.compute.manager [instance: 341b46c8-1584-42b7-a866-2b1fe1fde093] self._call_wait_func(context, wait_func, volume_api, vol['id'])"

2023-11-14 20:46:33 +0000 [warn]: #0 pattern not matched: "2023-11-14 20:46:33.922 7 ERROR nova.compute.manager [instance: 341b46c8-1584-42b7-a866-2b1fe1fde093] File \"/var/lib/kolla/venv/lib64/python3.9/site-packages/nova/virt/block_device.py\", line 790, in _call_wait_func"

This is a follow-up to this bug: https://bugs.launchpad.net/kolla-ansible/+bug/1872220