Label settings that may need a server restart.

[Ryado]

Some settings can be applied to specific queries using the SETTINGS keywords or the the current session using SET (eg. max_insert_threads). On the other hand, we can have settings that that must go into the profile and only takes effect on server restarts (eg. http_max_field_value_size , #36783).

We should distinguish these types of settings in the docs either grouping them into categories, or labelling the ones that require a server restart

[gingerwizard]

@alexey-milovidov given we want to automate doc generation for settings, can we get a flag on settings indicating if they need a restart?

[gingerwizard]

@Blargian one for you to research and add