[dns] - resolveTxt ttl flag

[tanguyantoine]

Is your feature request related to a problem? Please describe.
I would like to implement some application cache on top of dns.resolveTxt but TTL are not parsed nor returned by the dns lib

Describe the solution you'd like
The same way as https://nodejs.org/docs/latest-v15.x/api/dns.html#dns_dns_resolve4_hostname_options_callback I would love to have the ability to provide a ttl boolean flag so that I retrieved the dnx txt records with their ttl

Describe alternatives you've considered
None

Note: I updated unit tests to show case how I would like to use this API: #39529

[gireeshpunathil]

@nodejs/dns

[tniessen]

For reference, the ttl option was discussed in #5893 and added in #9296.

The implementation appears to achieve this using ares_parse_a_reply and ares_parse_aaaa_reply, respectively. However, other parse functions, such as ares_parse_ns_reply, ares_parse_ptr_reply, ares_parse_mx_reply, ares_parse_txt_reply_ext, etc. do not appear to support retrieving the TTL of the records.

[tniessen]

This appears to be a duplicate of #39399. Feel free to reopen if that's not correct.

[tanguyantoine]

haha I'm late ^^ 👍