Refresh test step passes regardless of whether `ExpectNonEmptyPlan` is `true` or `false`

### terraform-plugin-testing version

```
v1.14.0
```

### Relevant provider source code

```go

Steps: []resource.TestStep{
{
Config: `resource "terraform_data" "test" {
input = "asdf"
}`,
},
{
RefreshState: true,
ExpectNonEmptyPlan: false, // Passes whether this is true or false
},
},

```

### Terraform Configuration Files

```tf
# insert config here
```

### Expected Behavior

I would expect one of the test cases to fail - In theory the plan should be empty on the second step

### Actual Behavior

The test passes regardless of what `ExpectNonEmptyPlan` is set to

### Steps to Reproduce

Run the provided test case

### References