Adjusted regex to properly handle Windows paths

[N-Olbert]

Summary of the changes (Less than 80 chars)

• Fix Regex to consider Windows file path format

Closes #8517

[N-Olbert]

Maybe adding something like

<PropertyGroup>
  <PathMap>$([System.IO.Path]::GetFullPath('$(MSBuildThisFileDirectory)'))=./</PathMap>
</PropertyGroup>

to Directory.Build.Props would also be an option. This would make the entire StackTraceHelper obsolete and all stack traces deterministic.

The output of FilterInputType_Should_ThrowException_WhenNoConventionIsRegisteredDefault with that setting is:

For more details look at the `Errors` property.

1. For more details look at the `Errors` property.

1. No default filter convention found. Call `AddFiltering()` on the schema builder.
 (HotChocolate.Types.ObjectType)

   at HotChocolate.Data.FilterDescriptorContextExtensions.<>c__DisplayClass1_0.<GetFilterConvention>b__0() in ./HotChocolate/Data/src/Data/Filters/Extensions/FilterDescriptorContextExtensions.cs:line 19
   at HotChocolate.Types.Descriptors.DescriptorContext.GetConventionOrDefault[T](Func`1 factory, String scope) in ./HotChocolate/Core/src/Types/Types/Descriptors/Conventions/DescriptorContext.cs:line 165
   at HotChocolate.Data.FilterDescriptorContextExtensions.GetFilterConvention(IDescriptorContext context, String scope) in ./HotChocolate/Data/src/Data/Filters/Extensions/FilterDescriptorContextExtensions.cs:line 18
   at HotChocolate.Types.FilterObjectFieldDescriptorExtensions.<>c__DisplayClass5_0.<UseFiltering>b__1(IDescriptorContext c, ObjectFieldConfiguration definition) in ./HotChocolate/Data/src/Data/Filters/Extensions/FilterObjectFieldDescriptorExtensions.cs:line 128
   at HotChocolate.Types.Descriptors.DescriptorBase`1.<>c__DisplayClass21_0.<OnBeforeCreate>b__0(IDescriptorContext c, ITypeSystemConfiguration d) in ./HotChocolate/Core/src/Types/Types/Descriptors/DescriptorBase~1.cs:line 97
   at HotChocolate.Types.Descriptors.Configurations.OnCreateTypeSystemConfigurationTask.Configure(IDescriptorContext context) in ./HotChocolate/Core/src/Types/Types/Descriptors/Configurations/OnCreateTypeSystemConfigurationTask.cs:line 26
   at HotChocolate.Types.Descriptors.DescriptorBase`1.CreateConfiguration() in ./HotChocolate/Core/src/Types/Types/Descriptors/DescriptorBase~1.cs:line 57
   at HotChocolate.Types.Descriptors.ObjectTypeDescriptor.OnCreateConfiguration(ObjectTypeConfiguration definition) in ./HotChocolate/Core/src/Types/Types/Descriptors/ObjectTypeDescriptor.cs:line 94
   at HotChocolate.Types.Descriptors.DescriptorBase`1.CreateConfiguration() in ./HotChocolate/Core/src/Types/Types/Descriptors/DescriptorBase~1.cs:line 45
   at HotChocolate.Types.ObjectType.CreateConfiguration(ITypeDiscoveryContext context) in ./HotChocolate/Core/src/Types/Types/ObjectType.Initialization.cs:line 37
   at HotChocolate.Types.TypeSystemObject`1.Initialize(ITypeDiscoveryContext context) in ./HotChocolate/Core/src/Types/Types/TypeSystemObjectBase~1.cs:line 29
   at HotChocolate.Configuration.TypeRegistrar.InitializeType(TypeSystemObject typeSystemObject, String scope, Boolean isInferred) in ./HotChocolate/Core/src/Types/Configuration/TypeRegistrar.cs:line 177

I can provide a PR if requested