Error when using computed values with ember-decorators-polyfill installed or Ember 3.10.0

### Environment

- Ember Version: 3.6 with ember-decorators-polyfill or current 3.10.0-beta.2
- Ember CLI Version: 3.6
- Ember CP Validations Version: 3.5.5 and 4.0.0-beta.7

### Steps to Reproduce
I tested this with my work app at 3.8 and used the dummy app at 3.6 and installed ember-decorators-polyfill

Having validations that use a form of `computed` for their value.
models/user-detail.js - dob validator
```
after: computed(function() {
return moment()
.subtract(120, 'years')
.format('M/D/YYYY');
}).volatile(),
```
Results in the error:
Error: Assertion Failed: EmberObject.create no longer supports defining computed properties. Define computed properties using extend() or reopen() before calling create().

I tracked it in the debugger to
-private/options.js in the constructor for the Options class
```
constructor({ model, attribute, options = {} }) {
const optionKeys = keys(options);
const createParams = { [OPTION_KEYS]: optionKeys, model, attribute };

// If any of the options is a CP, we need to create a custom class for it
if (optionKeys.some(key => isDescriptor(options[key]))) {
return OptionsObject.extend(options).create(createParams);
}

return OptionsObject.create(createParams, options);
}
```

I chatted with Chris Garrett in e-decorators on the Ember discord. He suggested that the computed properties were not being detected and that you would always need to extend. He said the same error would apply with Ember 3.10 and I have been able to reproduce it with the dummy app and ember-source upgraded to 3.10.0-beta.2

I attempted update the code to always return `OptionsObject.extend(options).create(createParams);`

Which got rid of the error but then some of the tests were not passing.

Please let me know if there is more detail that I can provide.

Start by reproducing the computed-value validation in the dummy app with the listed Ember versions, then inspect private/options.js and the Options constructor. Review the existing tests that failed after always extending OptionsObject; done means the assertion no longer occurs and the full existing test suite passes.

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