graylog.yaml, data_dir is not written unless trustedproxies are in co…

[mazmar]

…nfig

What this PR does / why we need it

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

Special notes for your reviewer

Checklist

• [ ] DCO signed
• [ ] Chart Version bumped