[format] Unify name from target to destination

[Thespica]

Describe the enhancement requested

There are naming conflict with single concept in proto:
AdjListType call it target

meanwhile EdgeInfo call it destination

We can unify them to destination.

Component(s)

Format

[SemyonSinchenko]

@Thespica May we use dst and src instead of destination and source?

[Thespica]

@Thespica May we use dst and src instead of destination and source?

I think it will be better to use full name, cause source and destination are more like specific concepts. We should unify usages of them.

(appended)emmmmm... it do bother to use full name everywhere, I consider we can use full name for enum or constant string, use src and dst in higher API?