Revert "ci: use locally built pydantic-core with debug symbols

[sydney-runkle]

Codspeed broken with changes, temporarily reverting so we can do perf analysis in the meantime

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[codspeed-hq]

CodSpeed Performance Report

Merging #10942 will degrade performances by 9.86%

_{Comparing revert-codspeed-ci (9980020) with main (ed29a35)}

Summary

❌ 17 regressions
✅ 29 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	revert-codspeed-ci	Change
❌	test_efficiency_with_highly_nested_examples	719 µs	784.3 µs	-8.33%
❌	test_list_of_models_serialization	59.5 µs	63.5 µs	-6.27%
❌	test_model_json_serialization	60.5 µs	65.6 µs	-7.78%
❌	test_simple_model_serialization	32.6 µs	34.7 µs	-6.24%
❌	test_complex_model_validation[__init__]	54.4 µs	58.9 µs	-7.78%
❌	test_complex_model_validation[model_validate]	54.2 µs	59.4 µs	-8.77%
❌	test_list_of_models_validation[__init__]	94.3 µs	101.2 µs	-6.83%
❌	test_list_of_models_validation[model_validate]	92.1 µs	99.8 µs	-7.73%
❌	test_nested_model_validation[__init__]	56.7 µs	61.5 µs	-7.9%
❌	test_nested_model_validation[model_validate]	54.2 µs	58.8 µs	-7.83%
❌	test_simple_model_validation[__init__]	40 µs	42.3 µs	-5.34%
❌	test_simple_model_validation[model_validate]	41.2 µs	43.7 µs	-5.89%
❌	test_north_star_dump_python	15.9 ms	17 ms	-7%
❌	test_north_star_validate_json	53.4 ms	56.6 ms	-5.67%
❌	test_north_star_validate_json_strict	53.2 ms	56.4 ms	-5.61%
❌	test_north_star_validate_python	45.1 ms	48.2 ms	-6.49%
❌	test_north_star_validate_python_strict	27.2 ms	30.2 ms	-9.86%

[sydney-runkle]

@davidhewitt, I think we should revisit, I'm concerned this was due to v2.27.1 in pydantic-core...

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[sydney-runkle]

Merging just so we can get codspeed going again.