Add username to ASA Security negotiation log (#26975) (#28784)

* Add username to ASA Security negotiation log

I added the username user.name field to ASA Security negotiation log line.

* adding support for both formats

* adding changelog entry

* updating geo fields in expected output files

* reverse formatting

* reverting to older version of file

* reverting formatting again

* regenrate golden files again

* remove formatting, ready for review

* fixing missing message due to no newline

* fix dissect pattern to fit correctly

Co-authored-by: Marius Iversen <[email protected]>
(cherry picked from commit df6fde2)

Co-authored-by: LaZyDK <[email protected]>