TextBox selects all text when TextAlignment is Center or End if clicking/tapping on the left side

### Describe the bug

When an TextBox has TextAlignment set to Start, Center or End, clicking/tapping on the left side of the text area to focus the control selects all the text instead of placing the caret at the clicked position.

### Why is this important?

This behavior is inconsistent.

### Steps to reproduce the bug

Run the below code snippet
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### Actual behavior

When clicking/tapping on the left side of the text area to focus the control selects all the text.

### Expected behavior

When clicking/tapping on the left side of the text area to focus the control placing the caret at the clicked position.

### Screenshots

https://github.com/user-attachments/assets/d9388341-de44-496a-9a4e-96bbecb266a5

### NuGet package version

None

### Windows version

_No response_

### Additional context

_No response_