Test

Add pluggable backend dispatch system #687

Job	Run time
get-environments	9s
ensure-data-is-cached	1m 23s
Coverage (ubuntu-latest, hatch-test.py3.13-stable)	11m 26s
hatch-test.py3.12-stable (ubuntu-latest)	7m 16s
hatch-test.py3.13-pre (PRE-RELEASE DEPENDENCIES) (ubuntu-latest)	6m 42s
hatch-test.py3.13-stable (macos-latest)	12m 29s
Tests pass in all hatch environments	5s
	39m 30s

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