Support for .NET 8 #7364

Job	Run time
build-container / build-container (alpine, linux-musl)	6m 48s
build-centos-native / build-centos-native-container	5m 7s
build / build (windows-2022, /c/ProgramData/OpenTelemetry .NET AutoInstrumentation/logs)	9m 28s
build / build (ubuntu-20.04, /var/log/opentelemetry/dotnet)	5m 59s
build / build (macos-11, /var/log/opentelemetry/dotnet)	11m 8s
test-build-managed (net8.0, windows-2022)	14m 12s
test-build-managed (net8.0, ubuntu-20.04)	9m 39s
test-build-native (windows-2022)	7m 44s
test-build-managed (net8.0, macos-11)	12m 56s
test-build-windows-container-tests (windows-2022, windows-only)	29m 12s
test-build-managed (net7.0, windows-2022)	14m 50s
test-build-container (alpine, alpine, linux-musl)	19m 11s
test-build-managed (net7.0, ubuntu-20.04)	11m 49s
test-build-container (centos, ubuntu-20.04, linux-glibc)	16m 14s
test-build-managed (net7.0, macos-11)	13m 14s
test-build-container (debian, ubuntu-20.04, linux-glibc)	16m 11s
test-build-managed (net6.0, windows-2022)	14m 0s
test-build-managed (net6.0, ubuntu-20.04)	10m 4s
test-build-managed (net6.0, macos-11)	13m 43s
build-nuget-packages / build-nuget-packages	4m 34s
test-build-managed (net462, windows-2022)	13m 2s
test-nuget-packages (ubuntu-20.04)	3m 23s
test-nuget-packages (macos-11)	7m 8s
test-nuget-packages (windows-2022)	6m 44s
	4h 36m 20s

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