Integration tests located in a top-level folder

[orpheuslummis]

I suggest we gather all defradb's integration tests under the testing top-level folder. This way, bench and db integration tests can be there, p2ptestground once it's ready, and later on further tests such as for protocol integration, etc.

This way we

• avoid ending up with multiple top-level tests which would occlude the defradb packages
• do not have 'external' tooling (testground, stress testing tool, security testing tool, etc) inside a sub-folder of a package like net
• avoid having multiple integration tests sub-folders inside packages like db or net which 'compete' with source code sub-folders

The current way seems to be to have each integration test inside the folder of its most related package, and otherwise have the more general tests top-level. p2ptestground would be in node or net.

What is your preference, if any?

Answers from core team on Discord:

• Andy: I would be very much in favour of this, is odd/incorrect that the query-integration tests are in db and they should be moved
• Fred: Also in favour of this proposition.
• Shahzad: 100% in favor of this