[llvm] [Dexter] Use continue when resuming lldb execution to reach breakpoint (PR #156481)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams approved this pull request.

It's unclear to me whether LLDB's behaviour here is really desirable from an API/DAP-user perspective, but working around this behaviour in dexter is still needed either way. LGTM, ty!

https://github.com/llvm/llvm-project/pull/156481