date string coerced to datetime shouldn't infer timezone

[sydney-runkle]

Fix pydantic/pydantic#8762

[davidhewitt]

To fix lint: merge and rebase on this: #1191

[codspeed-hq]

CodSpeed Performance Report

Merging #1193 will create unknown performance changes

_{Comparing d-to-dt-tz-fix (c12d82c) with main (fadeecc)}

Summary

🆕 146 new benchmarks

Benchmarks breakdown

	Benchmark	main	d-to-dt-tz-fix	Change
🆕	test_build_schema	N/A	3.6 ms	N/A
🆕	test_complete_core_error	N/A	8.8 ms	N/A
🆕	test_complete_core_isinstance	N/A	8.6 ms	N/A
🆕	test_complete_core_json	N/A	2.6 ms	N/A
🆕	test_complete_core_lax	N/A	983.4 µs	N/A
🆕	test_complete_core_strict	N/A	938.8 µs	N/A
🆕	test_core_future	N/A	47 µs	N/A
🆕	test_core_future_str	N/A	31.6 µs	N/A
🆕	test_core_python	N/A	50.1 µs	N/A
🆕	test_core_raw	N/A	19.7 µs	N/A
🆕	test_core_str	N/A	38.8 µs	N/A
🆕	test_model_core_json	N/A	62.5 µs	N/A
🆕	test_core_future	N/A	37.4 µs	N/A
🆕	test_core_future_str	N/A	26.4 µs	N/A
🆕	test_date_from_date	N/A	19.6 µs	N/A
🆕	test_date_from_datetime	N/A	38.5 µs	N/A
🆕	test_date_from_datetime_str	N/A	29.5 µs	N/A
🆕	test_date_from_str	N/A	26.3 µs	N/A
🆕	test_decimal_from_string_core	N/A	37.4 µs	N/A
🆕	test_decimal_from_string_limit	N/A	26.8 µs	N/A
...	...	...	...	...

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