[Umbrella Feature]: Upgrade validation methods

[rly]

What would you like to see added to PyNWB?

Breaking changes (release in PyNWB 3.0)

• [ ] https://github.com/NeurodataWithoutBorders/pynwb/issues/1807
• [ ] https://github.com/hdmf-dev/hdmf/issues/608 and related https://github.com/hdmf-dev/hdmf/issues/525
• [ ] Move pynwb.validate into module pynwb.validation and other organizational changes https://github.com/NeurodataWithoutBorders/pynwb/pull/1493

Non-breaking changes that would be good to do in this breaking change:

• [ ] https://github.com/NeurodataWithoutBorders/pynwb/issues/1756
• [ ] https://github.com/NeurodataWithoutBorders/pynwb/issues/1179
• [ ] https://github.com/NeurodataWithoutBorders/pynwb/issues/942

There are a number of other validation-related issues and feature enhancements that we could tackle if time permits: https://github.com/hdmf-dev/hdmf/issues?q=is%3Aopen+label%3A%22topic%3A+validator%22+sort%3Aupdated-desc https://github.com/NeurodataWithoutBorders/pynwb/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22topic%3A+validator%22

Please suggest other features to bundle into this development.

Is your feature request related to a problem?

No response

What solution would you like?

n/a

Do you have any interest in helping implement the feature?

Yes.

Code of Conduct

• [X] I agree to follow this project's Code of Conduct
• [X] Have you checked the Contributing document?
• [X] Have you ensured this change was not already requested?

[rly]

Also related @stephprince https://github.com/NeurodataWithoutBorders/pynwb/issues/1009 or clear all loaded namespaces or something.

[rly]

Also related with namespaces https://docs.google.com/document/d/1DB1dg6PEDW40Iafj-kX-y_OZJsqyne7Edah82n17zoo/edit#heading=h.k9x5xabqgniy