[JAWS] Search results read "results found" instead of something useful

### Windows Terminal version

1.16.2642

### Windows build number

_No response_

### Other Software

JAWS (though this probably repros with any screen reader)

### Steps to reproduce

1. generate text (i.e. `ls`)
2. open search dialog (ctrl+shift+f)
3. search for something (i.e. `text`) NOTE: make sure there are results!

### Expected Behavior

the line of text should be read (i.e. `this is example text` where "text" is selected)

This gives context to the user

### Actual Behavior

reads "results available"

Most likely caused by https://github.com/microsoft/terminal/pull/12301

## Other feedback
- "no results found" is good!
- "findMatch" should work the exact same way
- when we loop around the buffer, we should say "back to top/bottom"

Start with the search dialog opened by Ctrl+Shift+F and review the behavior introduced in PR #12301. Reproduce the result announcement with JAWS, then verify that a match reads its surrounding line, no results remains clear, and wraparound announces the new buffer position.

Written by the indexing model from the issue text.