Add `ShowLabels` component, which controls whether instances’ labels are shown. #8434

Job	Run time
Checks / Check if running codegen would produce any changes	1m 57s
Checks / Rust lints (fmt, check, clippy, tests, doc)	5m 40s
Checks / Test Python Docs	25s
Checks / Python lints (ruff, mypy, …)	38s
Checks / C++ formatting check	3m 57s
Checks / Rerun lints	31s
Checks / C++ tests	10m 52s
Checks / Spell Check	6s
Python / Build Wheels	2m 44s
	26m 50s

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