Add index benchmark

[kenodegard]

Description

Adds a benchmark test so we can see the speed improvements with the new lazy index from conda 24.9.0.

A few things are done here:

1. We deprecate two unused arguments (locking and timeout) from conda_buil.index.get_build_index
2. We force the benchmark CI job to use conda=24.7 so we can get an accurate before measurement (we will revert this change in Lazy index #5488)
3. Add benchmark test in tests/test_index.py::test_get_build_index
4. Ignore filterwarings in pyproject.toml to avoid deprecation errors (we will revert this change in Lazy index #5488)

Xref #5488

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[codspeed-hq]

CodSpeed Performance Report

Merging #5508 will not alter performance

_{Comparing kenodegard:index-benchmark (1f533da) with main (56e5a04)}

Summary

✅ 4 untouched benchmarks

🆕 1 new benchmarks

Benchmarks breakdown

	Benchmark	main	kenodegard:index-benchmark	Change
🆕	test_get_build_index	N/A	1.6 s	N/A

[kenodegard]

This is a fix from #5488 that we need to get this merged