Fix AspNetCore UseExceptionHandler applied on postbacks #2671

Job	Run time
JS unit tests	1m 43s
.NET unit tests (ubuntu-latest)	4m 27s
Build published projects without warnings (Release)	3m 39s
Build all projects without errors	14m 50s
.NET unit tests (windows-2022)	12m 42s
Build published projects without warnings (Debug)	3m 55s
.NET unit tests (macOS-latest)	8m 44s
UI tests (chrome, ubuntu-latest, Production, Default)	15m 41s
UI tests (chrome, windows-2022, Development, Default)	32m 37s
UI tests (firefox, ubuntu-latest, Development, Default)	21m 33s
UI tests (firefox, ubuntu-latest, Production, Default)	20m 24s
UI tests (firefox, ubuntu-latest, Development, ExperimentalFeaturesTests)	22m 30s
UI tests (chrome, ubuntu-latest, Production, ExperimentalFeaturesTests)	15m 24s
	2h 58m 9s

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