Resizing terminal clears selection

### Windows Terminal version (or Windows build number)

Dev - latest

### Other Software

_No response_

### Steps to reproduce

1. Select text.
2. Resize the terminal vertically
3. Select text
4. Resize terminal horizontally

### Expected Behavior

- After 2: the selection should be preserved (both block and non-block selection)
- After 4: probably, non-block selection should remain adjusted to the new position of the selected text

### Actual Behavior

Selection is cleared both after 2 and 4 (inside _doResizeUnderLock)

Start at _doResizeUnderLock, which the issue identifies as clearing the selection, and reproduce the vertical and horizontal resize steps in Windows Terminal. The work is done when block selections remain preserved and non-block selections remain adjusted to the selected text after resizing.

Written by the indexing model from the issue text.