Upgrade to .NET 8.0 (#506) #1494

Job	Run time
integration-test (AcrApi, ef)	2m 47s
calc-version	23s
CodeQL-Analyze	7m 39s
analyze	5m 55s
integration-test (AcrApi, mongodb)	2m 56s
integration-test (DicomDimseScp, ef)	4m 14s
integration-test (DicomDimseScp, mongodb)	4m 20s
integration-test (DicomDimseScu, ef)	3m 1s
unit-test	6m 10s
integration-test (DicomDimseScu, mongodb)	4m 24s
integration-test (DicomWebExport, ef)	2m 49s
integration-test (DicomWebExport, mongodb)	3m 12s
integration-test (DicomWebStow, ef)	6m 39s
integration-test (DicomWebStow, mongodb)	4m 56s
integration-test (HealthLevel7, ef)	3m 36s
integration-test (HealthLevel7, mongodb)	3m 35s
integration-test (Fhir, ef)	3m 21s
integration-test (Fhir, mongodb)	3m 19s
integration-test (RemoteAppExecutionPlugIn, ef)	2m 23s
integration-test (RemoteAppExecutionPlugIn, mongodb)	2m 19s
build (ubuntu-latest)	4m 19s
docs	4m 38s
build (windows-latest)	4m 30s
Publish to GitHub Packages	16s
release	0s
	1h 31m 41s

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