Mnt py312

[tacaswell]

Description

Drop support for old jsonschema (to drop need to parse version strings)

Motivation and Context

Looking at conda-forge/event-model-feedstock#46 the failures are because our tests use distutils which were removed in py312. The first commit changes to use packgaing.version.parse instead. However, we only need to check version strings to support jsonschema < 3 which at this point is almost 5 years old so I think we can safely require a newer version of jsonschema.

If changing the dep pinning in too aggressive I can drop the second commit.

attn @ZLLentz

How Has This Been Tested?

[danielballan]

Upon closer inspection, this PR needs to remove the CI jobs targeting jsonschema 2.x

[tacaswell]

I 👍🏻 these changes, but can not in the UI because it is my own PR.

[danielballan]

Thanks @untzag !