[MAYA-126933] Maya crashes if USD instanceable is used together with varying visibility

**Describe the bug**
With Viewport 2.0 on, if USD instanceable is used together with varying visibility, Maya would crash when it is invisible.

**Steps to reproduce**
Steps to reproduce the behavior:
1. Create USD stage using the file I provided
2. Change timecode to 10
3. Maya crashes
4. Crash report shows there is an access violation for module "usd_usdImaging.dll"

**Attachments**
[instance_visibility_bug.zip](https://github.com/Autodesk/maya-usd/files/10358505/instance_visibility_bug.zip)
```
#usda 1.0

def Xform "instance1" (
instanceable = true
prepend references =
)
{
token visibility.timeSamples = {
0: "inherited",
10: "invisible",
}
}

over "Prototypes"
{
def Cube "Cube1"
{
}
}
```

**Specs (if applicable):**
- OS & version: Windows 10
- Maya version: 2023.3
- Maya USD: 0.21 Release for Maya 2023.3

**Additional context**
This problem shows up when I upgrade maya-usd from 0.20 to 0.21.
Now the only workaround I can come up with is to unmark this prim as instanceable, then Maya would not crash.