remaining associated types

[davidhewitt]

Change Summary

Continues #1237 even further, this time we remove GenericIterable completely and make tuple, set, and frozenset associated types.

While working on this I cut down significantly the number of types in the reworked GenericIterable enum. Based on the live code paths this should be functionally equivalent but hopefully have a smaller binary (or just less work for the optimizer to figure out what to prune).

Related issue number

N/A

Checklist

• Unit tests for the changes exist
• Documentation reflects the changes where applicable
• Pydantic tests pass with this pydantic-core (except for expected changes)
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[codspeed-hq]

CodSpeed Performance Report

Merging #1238 will not alter performance

_{Comparing dh/input-assocs (e5c5ded) with main (d73668f)}

Summary

✅ 152 untouched benchmarks