[llvm] [lldb] [lldb] Rename lldb-vscode to lldb-dap (PR #69264)

[Alex Langford via llvm-commits]

bulbazord wrote:

> @JDevlieghere Can you delete the `llvm-project/lldb/tools/lldb-vscode` directory from git after this commit to clean up our codebase? There are still two copies of the `lldb-dap` code in the sources:
> 
> ```
> lldb/tools/lldb-dap
> lldb/tools/lldb-vscode
> ```
> 
> I worry someone might make PR changes to the code in the `lldb-vscode` directory which is effectively dead at this point.

On my machine, `lldb-vscode` is a symlink.
```
alex at alangford lldb % ls -la tools/lldb-vscode
lrwxr-xr-x@ 1 alex  staff  8 Oct 19 13:34 tools/lldb-vscode -> lldb-dap
```

https://github.com/llvm/llvm-project/pull/69264