WIP: feat: `tags` property on tests and subtests #345

Job	Run time
block-autosquash-commits	0s
Check (ubuntu-latest, stable)	44s
Rustfmt (stable)	15s
cargo-deny	16s
Check (ubuntu-latest, beta)	33s
Check (windows-latest, stable)	1m 44s
Check (windows-latest, beta)	1m 19s
Check (macOS-latest, stable)	32s
Check (macOS-latest, beta)	35s
Clippy (stable)	29s
Documentation (stable)	32s
Clippy (beta)	34s
Test Suite (ubuntu-latest, stable)	1m 7s
Documentation (beta)	31s
Test Suite (ubuntu-latest, beta)	58s
Test Suite (windows-latest, stable)	4m 11s
Test Suite (windows-latest, beta)	1m 40s
Test Suite (macOS-latest, stable)	47s
Test Suite (macOS-latest, beta)	52s
	17m 39s

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