re-enable codspeed

[matmair]

Updates the runner selection logic to only use codspeed-macro if the workflow is triggered by a push to the master branch or if the pull request is labeled with performance-run.

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[codspeed-hq]

Merging this PR will degrade performance by 61.63%

❌ 2 regressed benchmarks
⏩ 42 skipped benchmarks¹

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

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	test_api_stock_list	435.5 ms	1,134.8 ms	-61.63%
❌	WallTime	test_api_part_list	388.4 ms	963.7 ms	-59.7%

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_{Comparing matmair:re-enable-codspeed (7f0fab8) with master (cdcfdd8)²}

Footnotes

1. 42 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on master (4d40435) during the generation of this report, so cdcfdd8 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[matmair]

@SchrodingersGat ready for review and merge