Implement [`[RFC] Add a Python check command to lldb-dap and lldb`](https://discourse.llvm.org/t/rfc-add-a-python-check-command-to-lldb-dap-and-lldb/88972). This patch adds the `--check-python` flag to `lldb-dap` on Windows, to allow dap clients to verify the correct Python version is available before trying to start `lldb-dap`. Depends on: - https://github.com/llvm/llvm-project/pull/180786 rdar://165442474