Better error message for wrong assembly name in directives #2883

Job	Run time
.NET unit tests (ubuntu-latest)	3m 38s
Build all projects without errors	9m 46s
JS unit tests	1m 12s
Build published projects without warnings (Release)	2m 35s
.NET unit tests (windows-2022)	11m 2s
UI tests (chrome, ubuntu-latest, Production, Default)	13m 10s
Build published projects without warnings (Debug)	2m 33s
.NET unit tests (macOS-latest)	7m 9s
UI tests (chrome, windows-2022, Development, Default)	17m 18s
UI tests (firefox, ubuntu-latest, Development, Default)	18m 30s
UI tests (firefox, ubuntu-latest, Production, Default)	17m 32s
UI tests (firefox, ubuntu-latest, Development, ExperimentalFeaturesTests)	18m 49s
UI tests (chrome, ubuntu-latest, Production, ExperimentalFeaturesTests)	12m 59s
	2h 16m 13s

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