Add `LabelBar` datagrid mode #1649

Job	Run time
lint_and_docs (ubuntu-22.04, 3.11, 22.x)	10m 9s
build_and_test_rust (ubuntu-22.04, x86_64, 22.x)	14m 23s
build_js (ubuntu-22.04, 3.11, 22.x)	22m 59s
build_python (ubuntu-22.04, x86_64, 3.11, 22.x)	17m 30s
build_emscripten_wheel (ubuntu-22.04, x86_64, 3.11, 22.x)	15m 30s
build_python (ubuntu-22.04-arm, aarch64, 3.11, 22.x)	14m 36s
test_emscripten_wheel (ubuntu-22.04, x86_64, 3.11, 22.x)	2m 35s
test_python (ubuntu-22.04-arm, aarch64, 3.11, 22.x)	2m 3s
test_python (ubuntu-22.04, x86_64, 3.11, 22.x)	1m 58s
test_js (ubuntu-22.04, 3.11, 22.x)	6m 27s
build_and_test_jupyterlab (ubuntu-22.04, x86_64, 3.11, 22.x)	3m 28s
benchmark_python	0s
benchmark_js	0s
test_python_sdist	0s
publish	0s
	1h 51m 38s

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