Warning on rejected async validation

### Runtime

node.js

### Runtime version

18+

### Module version

17.13.3

### Last module version without issue

_No response_

### Used with

standalone

### Any other relevant information

_No response_

### What are you trying to achieve or the steps to reproduce?

Currently synchronous validation returns `ValidationResult` type, which is following:
```typescript
type ValidationResult = {
error: undefined;
warning?: ValidationError;
value: TSchema;
} | {
error: ValidationError;
warning?: ValidationError;
value: any;
}
```
So both in case of successful validation and error we always have warnings in the result. But when switching to asynchronous validation with warnings turned on `validateAsync(value, { warnings: true })` in case of error the promise rejects and we have only `ValidationError` which doesn't incllude any warnings.

If this is by design, and synchronous and asynchronous validation have that difference, then it's not documented anywhere clearly.

**Is there any way to still have the warnings in case of promise rejection for async validation?**

### What was the result you got?

`error` on promise rejection

### What result did you expect?

`error` with warnings included