Offer functions to work with data table column meta data

[flash1293]

Once #80548 is merged, the central data structure in expression based applications in Kibana will contain a lot of meta information: https://github.com/elastic/kibana/pull/80548/files#diff-41350c285cb5101adad8c0903724e53baf6647112c540f76e065c79baf12a72aR70

Currently these pieces of information are generated by some datasources and consumed by some renderers, but there is no way to manipulate them. Also, existing expression functions might not treat them right.

TODOs:

• Provide function to copy column meta data
• Provide function to modify/remove column meta (meta todos: figure out how exactly this function would look like)
• Vet existing functions whether they handle meta data gracefully

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)

[ppisljar]

@flash1293 does #78745 cover all the things you meant with this issue ? if so can we close it as a duplicate ?

[flash1293]

@ppisljar It seems like #78745 is about providing utility Javascript functions while this issue is specifically about expression functions so meta data can be manipulated as part of the expression without writing use-case specific one-off expression functions.

[ppisljar]

for now we don't plan to provide utility expression functions to manipulate meta with the reasoning that it should not be done from expressions. Specific functions might write meta information or manipulate it but this should not be controlled by the writer of expression