Add optional subdirectory for stage in application package #5871

Job	Run time
define-matrix / define-matrix	1s
e2e-fork	0s
e2e-trusted (windows-latest, 3.10) / tests-trusted	7m 35s
e2e-trusted (ubuntu-latest, 3.10) / tests-trusted	3m 54s
	11m 30s

Provide feedback