[lldb] Print stack trace when lldb-vscode crashes

Print LLVM's pretty stack trace when lldb-vscode crashes. Also removes
the unnecessary call to PrintStackTraceOnErrorSignal in lldb-server as
it's already part of InitLLVM.

Differential revision: https://reviews.llvm.org/D99535

GitOrigin-RevId: 047cbfe2bbf22a9da1bd27cafcee4eb1453965dc
2 files changed