[lldb] [llvm] [lldb] Real-time console pane for output in lldb tui (PR #177160)

[David Spickett via llvm-commits]

DavidSpickett wrote:

I had to revert this as the test was stalling. I think it's something to do with the "large output" pushing the other output out of the pane before it can be read.

One theory is that we ask for:
```
        self.launch(
            executable=self.getBuildArtifact("a.out"),
            dimensions=(100, 500),
            run_under=["env", "TERM=xterm"],
        )
```
(btw, why do we need the TERM= ?)

And it doesn't actually give us 500 lines. I need to check what guarantees that request has.

https://github.com/llvm/llvm-project/pull/177160