GenerateAdditionalSources target runs after MarkupCompile

The `GenerateAdditionalSources` target is used to generate AssemblyAttributes like [AssemblyVersion]:
https://github.com/dotnet/msbuild/blob/40f49cd8d06ec3ed6933fa66183e8d1615cb2edc/src/Tasks/Microsoft.Common.CurrentVersion.targets#L3568

However it runs after MarkupCompile, and GenerateTemporaryTargetAssembly doesn't take it into account.

So at the time BAML is compiled, the default 0.0.0.0 version is being baked into BAML (since the temp assembly passed to MarkupCompilePass2 doesn't have the version set yet). This causes runtime exceptions.

We need to make sure that the files generated during the build are added to GenerateTemporaryTargetAssembly.