Add go.mongodb.org/mongo-driver/v2 specific instrumentation

[MrAlias]

v2 specific instrumentation needs to be added in addition. Support for v1 needs to continue.

Originally posted by @MrAlias in #6418 (comment)

[MrAlias]

Currently the Mongo DB instrumentation has no owner. The new owner needs to assume this task or we should close this along with #5551 if we do not land on ownership.

[MrAlias]

cc @prestonvasquez

[AlaricWhitney]

I did a copy/paste implementation using the new mongo-driver/v2 library: #6539

I chose the folder structure to match the golang package name.

[prestonvasquez]

@MrAlias I would be happy to help review #6539.

[dmathieu]

I would be happy to help review

Feel free to do so, as that's definitely a good way forward being code owner :)