[RFE] trace/dns: Improve by including more information in the events

[mqasimsarfraz]

Current situation

Currently, we are missing some information in the DNS events which could be helpful under some scenarios:

• TTL information for responses
• Header flag values (RA, RD, TC e.g)
• A field to show the message was compressed

Implementation options

For built-in gadgets, since we switched to parsing DNS packets in userspace we can use gopacket to include more information that is already available.

[github-actions]

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