IntegV2 Usability Quest

[jmayclin]

Problem:

IntegV2 is difficult to use, and generally in a bit of a neglected state. Let's fix it!

The items/roadmap is outlined in much greater detail here, but this github tracks the higher level issues.

Solution:

• make things locally runnable on a best-effort basis. tests: make integV2 locally runnable #5029
• allow OpenSSL 3.0 as an OpenSSL provider.
• format code with ruff
• deprecate test_pq_handshake
• properly comment code (class members)
• lint code
• deprecate CMake/Tox
• fix parallelism issue ( Integration port collisions #2127 )
• type checking
• reasonable parameter selection (Integ test bloat #4375 )