Exception when deserializing inherited type from json

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

Trying this:

```
type Animal() = class end

type Foo() =
inherit Animal()
member val Name = "init" with get, set

let js = """{"Name":"Ed"}"""
let x = System.Text.Json.JsonSerializer.Deserialize(js) // zzz not good
```

Threw this:

```
AmbiguousMatchException: Multiple custom attributes of the same type 'Microsoft.FSharp.Core.CompilationMappingAttribute' found.
at System.Attribute.GetCustomAttribute(MemberInfo element, Type attributeType, Boolean inherit)
at System.Text.Json.Serialization.Metadata.FSharpCoreReflectionProxy.IsFSharpType(Type type)
at System.Text.Json.Serialization.Converters.FSharpTypeConverterFactory.CanConvert(Type typeToConvert)
at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetBuiltInConverter(Type typeToConvert)
at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetConverterForType(Type typeToConvert, JsonSerializerOptions options, Boolean resolveJsonConverterAttribute)
at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetTypeInfo(Type type, JsonSerializerOptions options)
at System.Text.Json.JsonSerializerOptions.GetTypeInfoNoCaching(Type type)
at System.Text.Json.JsonSerializerOptions.CachingContext.CreateCacheEntry(Type type, CachingContext context)
--- End of stack trace from previous location ---
at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Nullable`1 ensureNotNull, Boolean resolveIfMutable, Boolean fallBackToNearestAncestorType)
at System.Text.Json.JsonSerializerOptions.GetTypeInfoForRootType(Type type, Boolean fallBackToNearestAncestorType)
at System.Text.Json.JsonSerializer.GetTypeInfo[T](JsonSerializerOptions options)
at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
:
--- End of stack trace from previous location ---
```

### Expected Behavior

_No response_

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### .NET Version

_No response_

### Anything else?

_No response_