refactor: split toolchains and repositories (#323) #1195

Job	Run time
test-release	22s
verify-bcr-patches	5s
test / matrix-prep-bazelversion	5s
test / matrix-prep-os	1s
test / test (ubuntu-latest, 7.0.2, ., false)	7m 23s
test / test (ubuntu-latest, 7.0.2, e2e/smoke, true)	5m 16s
test / test (ubuntu-latest, 7.0.2, e2e/smoke, false)	2m 31s
test / test (ubuntu-latest, 7.0.2, e2e/repository-rule-deps, true)	5m 15s
test / test (ubuntu-latest, 7.0.2, e2e/system-interpreter, true)	5m 13s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, true)	5m 21s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, false)	2m 45s
test / test (ubuntu-latest, 6.4.0, e2e/repository-rule-deps, true)	5m 23s
test / test (ubuntu-latest, 6.4.0, e2e/system-interpreter, true)	5m 37s
test / test (macos-latest, 7.0.2, ., false)	26m 1s
test / test (macos-latest, 7.0.2, e2e/smoke, true)	7m 23s
test / test (macos-latest, 7.0.2, e2e/smoke, false)	4m 24s
test / test (macos-latest, 7.0.2, e2e/repository-rule-deps, true)	7m 31s
test / test (macos-latest, 7.0.2, e2e/system-interpreter, true)	8m 10s
test / test (macos-latest, 6.4.0, e2e/smoke, true)	7m 54s
test / test (macos-latest, 6.4.0, e2e/smoke, false)	6m 51s
test / test (macos-latest, 6.4.0, e2e/repository-rule-deps, true)	8m 4s
test / test (macos-latest, 6.4.0, e2e/system-interpreter, true)	8m 26s
	2h 10m 1s

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