Include some functions from Utilsplugin2

[akks]

There was very long ago when we moved any functionalty from Utilsplugin2 to core.

At current moment, there are some useful and long-tested functions in this plugin that may help all users.

Of course, the careful discussion is needed and maybe some menu reorganization.
(after we decide which functions should be included)

I propose following candidate functions (most widely used?):

1. Replace Geometry [reason: motivate users to maintain history of objects] (#8821)
2. Add nodes on intersections [reason: it only calls one core function, nothing more]
3. Copy tags from previous selection [reason: very easy to tag similar objects]
4. Search predicates "inside", "intersecting", "adjacent", maybe even "allintersecting", "connected" (#5905)
5. Some of selection menu actions, for example - Unselect nodes, Select adjacent nodes, Select intersecting ways

What do you think? (1-.., 2-.., ...)
(Sorry for huge copy-list)