unify 'profile.profiling' configuration

[davidhewitt]

Change Summary

Just makes things a bit more uniform in how configuration is applied for profiling locally & on codspeed.

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

[samuelcolvin]

LGTM

[codspeed-hq]

CodSpeed Performance Report

Merging #1158 will degrade performances by 13.59%

_{Comparing dh/cargo-profiling (deb1b1b) with main (fa65fcd)}

Summary

⚡ 2 improvements
❌ 1 regressions
✅ 139 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	main	dh/cargo-profiling	Change
❌	test_small_class_core_model	50.5 µs	58.4 µs	-13.59%
⚡	test_core_future_str	39 µs	31.5 µs	+24.03%
⚡	test_tuple_many_variable	43.3 µs	33.6 µs	+28.83%