(feat) initializeServerApp support for App Hosting auto init #16111

Job	Run time
Test Auth on Firefox If Changed	3m 42s
Test Auth on Chrome and Node If Changed	3m 18s
Test Auth on Webkit if Changed	3m 27s
Test Auth on Chrome and Node If Changed	3m 27s
Test Auth on Firefox If Changed	3m 42s
Test Auth on Webkit if Changed	3m 27s
Test Auth on Chrome and Node If Changed	3m 58s
Test Auth on Firefox If Changed	3m 42s
Test Auth on Webkit if Changed	3m 27s
	32m 10s

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