Add target endpoint to `CommissioningWindowOpener` #88198

Job	Run time
Build framework (macos-release, -sdk macosx -configuration Release)	11m 46s
Build framework (ios-release, -sdk iphoneos -configuration Release)	9m 46s
Build framework (tvos-debug, -sdk appletvos -configuration Debug)	10m 14s
Build framework (watchos-debug, -sdk watchos -configuration Debug)	10m 26s
Run framework tests (asan, -enableAddressSanitizer YES -enableUndefinedBehaviorSanitizer YES)	30m 57s
Run framework tests (tsan, -enableThreadSanitizer YES)	26m 5s
Run framework tests (leaks, ENABLE_LEAK_DETECTION=1)	24m 52s
	2h 4m 6s

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