[Windows] Stepper semantics are not representative

### Description

Stepper semantics are not representative of what the control actually does / stands for.

Among various oddities:
- The stepper "-" button gets announced by Narrator as "hyphen" and "+" button as "plus button"
- SemanticProperties.Description only gets announced from the "-" button
- Hint doesn't get announced at all https://github.com/dotnet/maui/issues/14023

### Steps to Reproduce

1. Deploy .NET MAUI control gallery
2. Navigate to SemanticsPage
3. Turn on screen reader
4. Go to stepper control and tap/swipe through it

### Version with bug

7.0 (current)

### Last version that worked well

Unknown/Other

### Affected platforms

Windows

### Affected platform versions

/

### Did you find any workaround?

_No response_

### Relevant log output

_No response_