Linker fails for F# projects in .NET 5+

[jonathanpeppers]

Context: dotnet/android#5040

Some F# tests we have that use the linker fail with:

Errors
    ILLink error IL1012: IL Linker has encountered an unexpected error. Please report the issue at https://github.com/mono/linker/issues [C:\src\xamarin-android\bin\TestDebug\temp\CheckResourceDesignerIsCreatedTrueFSharp\UnnamedProject.fsproj]
Fatal error in IL Linker
Unhandled exception. System.ArgumentOutOfRangeException: Length cannot be less than zero. (Parameter 'length')
    at System.String.Substring(Int32 startIndex, Int32 length)
    at Mono.Linker.TypeReferenceExtensions.GetDisplayNameWithoutNamespace(TypeReference type)
    at Mono.Linker.TypeReferenceExtensions.GetDisplayName(TypeReference type)
    at Mono.Linker.Dataflow.DiagnosticUtilities.GetGenericParameterDescriptionForErrorMessage(GenericParameter genericParameter)
    at Mono.Linker.Dataflow.DiagnosticUtilities.GetMetadataTokenDescriptionForErrorMessage(IMetadataTokenProvider targetContext)
    at Mono.Linker.Dataflow.ReflectionMethodBodyScanner.GetValueDescriptionForErrorMessage(ValueNode value)
    at Mono.Linker.Dataflow.ReflectionMethodBodyScanner.RequireDynamicallyAccessedMembers(ReflectionPatternContext& reflectionContext, DynamicallyAccessedMemberTypes requiredMemberTypes, ValueNode value, IMetadataTokenProvider targetContext)
    at Mono.Linker.Dataflow.ReflectionMethodBodyScanner.ProcessGenericArgumentDataFlow(GenericParameter genericParameter, TypeReference genericArgument, IMemberDefinition source)
    at Mono.Linker.Steps.MarkStep.MarkGenericArgumentConstructors(IGenericInstance instance, IMemberDefinition sourceLocationMember)
    at Mono.Linker.Steps.MarkStep.MarkGenericArguments(IGenericInstance instance, IMemberDefinition sourceLocationMember)
    at Mono.Linker.Steps.MarkStep.GetOriginalType(TypeReference type, DependencyInfo reason, IMemberDefinition sourceLocationMember)
    at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference, DependencyInfo reason, IMemberDefinition sourceLocationMember)
    at Mono.Linker.Steps.MarkStep.MarkField(FieldDefinition field, DependencyInfo& reason)
    at Mono.Linker.Steps.MarkStep.MarkEntireType(TypeDefinition type, Boolean includeBaseTypes, DependencyInfo& reason, IMemberDefinition sourceLocationMember)
    at Mono.Linker.Steps.MarkStep.MarkEntireType(TypeDefinition type, Boolean includeBaseTypes, DependencyInfo& reason, IMemberDefinition sourceLocationMember)
    at Mono.Linker.Steps.MarkStep.MarkEntireAssembly(AssemblyDefinition assembly)
    at Mono.Linker.Steps.MarkStep.InitializeAssembly(AssemblyDefinition assembly)
    at Mono.Linker.Steps.MarkStep.Initialize()
    at Mono.Linker.Steps.MarkStep.Process(LinkContext context)
    at Mono.Linker.Pipeline.ProcessStep(LinkContext context, IStep step)
    at Mono.Linker.Pipeline.Process(LinkContext context)
    at Mono.Linker.Driver.Run(ILogger customLogger)
    at Mono.Linker.Driver.Main(String[] args)
The command exited with code -532462766.

I think this may have been introduced here: 095f30a

It might be related to F# generics, maybe their types do not include a ` character?

[jonathanpeppers]

/cc @marek-safar