Fix AspNetCore UseExceptionHandler applied on postbacks #2670

Job	Run time
Build all projects without errors	11m 2s
JS unit tests	1m 49s
Build published projects without warnings (Release)	3m 43s
Build published projects without warnings (Debug)	4m 52s
UI tests (chrome, ubuntu-latest, Production, Default)	16m 44s
.NET unit tests (ubuntu-latest)	3m 51s
UI tests (chrome, windows-2022, Development, Default)	28m 8s
.NET unit tests (windows-2022)	15m 45s
.NET unit tests (macOS-latest)	6m 46s
UI tests (firefox, ubuntu-latest, Development, Default)	22m 41s
UI tests (firefox, ubuntu-latest, Production, Default)	19m 19s
UI tests (firefox, ubuntu-latest, Development, ExperimentalFeaturesTests)	23m 53s
UI tests (chrome, ubuntu-latest, Production, ExperimentalFeaturesTests)	14m 58s
	2h 53m 31s

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