merge from upstream main

[eli-bl]

This change is only for Benchling's internal use of the package. It merges changes from upstream main to our prod/2.x fork, bringing us to parity with all upstream fixes and new features so far. (This does not mean our fork is now the same as main - there are still areas where we have deliberately made changes for our own use, like removing pdm, plus fixes/features in our fork that have not been accepted to main, like the functional tests.)

The following upstream PRs are included:

• feat: Support Ruff 0.8 openapi-generators/openapi-python-client#1169, feat: Support httpx 0.28 openapi-generators/openapi-python-client#1172, fix: Support Typer 0.14 and 0.15 openapi-generators/openapi-python-client#1173, Fix minimum attrs version openapi-generators/openapi-python-client#1184, (dependency updates)
• Properly rebuild Pydantic models if necessary openapi-generators/openapi-python-client#1176 (Pydantic bugfix - this replaces our own less-optimal fix on the fork in eng: fix forward type reference in Pydantic schemas BNCH-112697 #223)
• Don't fully delete output directories openapi-generators/openapi-python-client#1183
• fix: import cast for required const properties, since it's used in the template openapi-generators/openapi-python-client#1153
• fix: allow required fields list to be specified as empty (#651) openapi-generators/openapi-python-client#1149

Many other changes in the diff are simply replacements of Dict[T], List[T], etc. with dict[T], list[T], etc. as a style change due to dropping Python 3.8.

[eli-bl]

@edwin-benchling For what it's worth, I think it's probably not worthwhile to try to read through the diff in detail or compare it to the original PRs. There are going to be more of these PRs since the upstream project is actively (if slowly) maintained, and they're all going to look like this: very similar to the original PRs, but never identical because there is still divergence on our fork.

The project has guaranteed 100% test coverage, so the tests are evidence that the merge is valid.