It was unhappy with the exact line lengths and this change

Now that the Terminal is doing a better job of actually marking which
lines were and were not wrapped, we're not always copying lines as
"wrapped" when they should be. We're more correctly marking lines as not
wrapped, when previously we'd leave them marked wrapped.

The real problem is here in the `ScrollFrame` method - we'd manually
newline the cursor to make the terminal's viewport shift down to a new
line. If we had to scroll the viewport for a _wrapped_ line, this would
cause the Terminal to mark that line as broken, because conpty would
emit an extra `\n` that didn't actually exist.

This more correctly implements `ScrollFrame`. Now, well move where we
"thought" the cursor was, so when we get to the next `PaintBufferLine`,
if the cursor needs to newline for the next line, it'll newline, but if
we're in the middle of a wrapped line, we'll just keep printing the
wrapped line.

A couple follow up bugs were found to be caused by the same bad logic.
See #5039 and #5161 for more details on the investigations there.

## References

* #4741 RwR, which probably made this worse
* #5122, which I branched off of 
* #1245, #357 - a pair of other conpty wrapped lines bugs
* #5228 - A followup issue for this PR

## PR Checklist
* [x] Closes #5113
* [x] Closes #5180 (by fixing DECRST 25)
* [x] Closes #5039
* [x] Closes #5161 (by ensuring we only `removeSpaces` on the actual
  bottom line)
* [x] I work here
* [x] Tests added/passed
* [n/a] Requires documentation to be updated

## Validation Steps Performed

* Checked the cases from #1245, #357 to validate that they still work
* Added more and more tests for these scenarios, and then I added MORE
  tests
* The entire team played with this in selfhost builds

Improve wide glyph support in UIA (GH-4946)
Add enhanced key support for ConPty (GH-5021)
Set DxRenderer non-text alias mode (GH-5149)
Reduce CursorChanged Events for Accessibility (GH-5196)
Add more object ID tracing for Accessibility (GH-5215)
Add SS3 cursor key encoding to ConPty (GH-5383)
UIA: Prevent crash from invalid UTR endpoint comparison (GH-5399)
Make CodepointWidthDetector::GetWidth faster (CC-3727)
add til::math, use it for float conversions to point, size (GH-5150)
Add support for renderer backoff, don't FAIL_FAST on 3x failures, add UI (GH-5353)
Fix a deadlock and a bounding rects issue in UIA (GH-5385)
Don't duplicate spaces from potentially-wrapped EOL-deferred lines (GH-5398)
Reimplement the VT tab stop functionality (CC-5173)
Clamp parameter values to a maximum of 32767. (CC-5200)
Prevent the cursor type being reset when changing the visibility (CC-5251)
Make RIS switch back to the main buffer (CC-5248)
Add support for the DSR-OS operating status report (CC-5300)
Update the virtual bottom location if the cursor moves below it (CC-5317)
ci: run spell check in CI, fix remaining issues (CC-4799) (CC-5352)
Set Cascadia Code as default font (GH-5121)
Show a double width cursor for double width characters (GH-5319)
Delegate all character input to the character event handler (CC-4192)
Update til::bitmap to use dynamic_bitset<> + libpopcnt (GH-5092)
Merged PR 4465022: [Git2Git] Merged PR 4464559: Console: Ingest OSS changes up to e055079
Correct scrolling invalidation region for tmux in pty w/ bitmap (GH-5122)
Render row-by-row instead of invalidating entire screen (GH-5185)
Make conechokey use ReadConsoleInputW by default (GH-5148)
Manually pass mouse wheel messages to TermControls (GH-5131)
This fixes C-M-space for WSL but not for Win32, but I'm not sure there's a problem in Win32 quite yet. (GH-5208)
Fix copying wrapped lines by implementing better scrolling (GH-5181)
Emit lines wrapped due to spaces at the end correctly (GH-5294)
Remove unneeded whitespace (CC-5162)