Reorganize the tests into unit/functional/integration/external #66

Job	Run time
pre-commit / pre-commit	18s
pre-commit / lint-extension	1m 53s
codeql / codeql	2m 56s
test-unit-functional-integration / test-pip (3.11, unit)	2m 26s
test-ui / test-ui	4m 36s
test-conda / test-conda (ubuntu-latest, 3.11)	10m 53s
test-unit-functional-integration / test-pip (3.11, functional)	3m 49s
test-pip / test-pip (3.8, ~=2.0)	9m 32s
test-conda / test-conda (macos-latest, 3.11)	15m 1s
test-unit-functional-integration / test-pip (3.11, integration)	3m 8s
test-pip / test-pip (3.9, ~=2.0)	9m 47s
test-conda / test-conda (windows-latest, 3.11)	14m 53s
test-unit-functional-integration / test-pip (3.11, external)	6m 10s
test-pip / test-pip (3.10, ~=2.0)	9m 43s
test-pip / test-pip (3.11, ~=2.0)	9m 45s
test-pip / test-pip (3.12-dev, true)	11m 41s
test-pip / test-pip (3.13-dev, true)	10m 31s
test-pip / test-pip (3.x)	11m 50s
test-pip / test-pip (3.x, ~=3.0)	11m 51s
test-pip / test-pip (3.x, ~=4.0, true)	1m 52s
test-pip / test-pip (3.x, true)	10m 1s
test-pip / test-pip (3.x, true)	12m 34s
build	1s
pass	3s
	2h 55m 14s

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