fix: inherit concurrent/sequential in nested suites #6798

Job	Run time
lint	1m 13s
lint	1m 13s
test-browser-windows (chrome, chromium)	6m 42s
test-browser-windows (chrome, chromium)	6m 42s
test-browser (chrome, chromium)	3m 22s
test-browser (chrome, chromium)	3m 22s
test-browser-windows (edge, webkit)	6m 24s
test-browser-windows (edge, webkit)	6m 24s
test (ubuntu-latest, 18)	8m 6s
test (ubuntu-latest, 18)	8m 6s
test-browser (firefox, firefox)	4m 41s
test-browser (firefox, firefox)	4m 41s
test (ubuntu-latest, 20)	2m 11s
test (ubuntu-latest, 20)	13m 27s
test-ui	2m 6s
test-ui	2m 6s
test-browser (edge, webkit)	4m 23s
test-browser (edge, webkit)	4m 23s
test (macos-latest, 20)	30m 15s
test (macos-latest, 20)	11m 54s
typecheck	2m 0s
typecheck	2m 0s
test (windows-latest, 20)	13m 54s
test (windows-latest, 20)	10m 36s
	2h 40m 11s

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