PropertyInfo.IsDefined doesn't respect inherit=true

### Description

Calling `PropertyInfo.IsDefined(type, inherit: true)` doesn't work as expected.

```C#
class Base
{
[Description("my description")]
public virtual string Name { get; set; }
}
class Derived : Base
{
public override string Name { get => base.Name; set => base.Name = value; }
}

static int Main(string[] args)
{
var pi = typeof(Derived).GetProperty("Name");

Console.WriteLine(pi.IsDefined(typeof(DescriptionAttribute), inherit: false)); // prints `False` as expected
Console.WriteLine(pi.IsDefined(typeof(DescriptionAttribute), inherit: true)); // BUG - this prints `False`

Console.WriteLine(pi.IsDefined(typeof(DescriptionAttribute))); // prints `True` as expected
Console.WriteLine(CustomAttributeExtensions.IsDefined(pi, typeof(DescriptionAttribute), inherit: false)); // prints `False` as expected
Console.WriteLine(CustomAttributeExtensions.IsDefined(pi, typeof(DescriptionAttribute), inherit: true)); // prints `True` as expected
}
```

### Configuration

* Which version of .NET is the code running on? .NET 5
* What OS and version, and what distro if applicable? windows
* What is the architecture (x64, x86, ARM, ARM64)? x64
* Do you know whether it is specific to that configuration? It is not.

### Regression?

No. Tried the above code on .NET Framework 4.8 and it appears to have the same behavior as .NET 5.

### Other information

https://github.com/dotnet/runtime/blob/8636dc8a76d687169db64033b71ec9f79d9ba4b5/src/coreclr/System.Private.CoreLib/src/System/Reflection/RuntimePropertyInfo.cs#L153-L164

That code doesn't use the `inherit` parameter.

This may be a problem in other Reflection APIs, we should do an inspection of other APIs that may have this same problem.