Test Support Bundle Syslog Paths

https://github.com/longhorn/longhorn/issues/6544

Test /var/log/messages

Given Longhorn installed on SUSE Linux
When generated support-bundle
And syslog exists in the messages file

Test /var/log/syslog

Given Longhorn installed on Ubuntu Linux
When generated support-bundle
And syslog exists in the syslog file

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