Bug type: Debugger

Describe the bug

• OS and Version: Windows 10, 19044.1348
• VS Code Version: 1.62.3
• C/C++ Extension Version: 1.7.1
• Other extensions you installed (and if the issue persists after disabling them):
• A clear and concise description of what the bug is.
  When specifying a remote address in launch.json, like "miDebuggerServerAddress": "192.168.35.2:6000", and setting requestType to attach, the progress picker shown is for local processes. We need the remote processes instead (with a command like info os processes for gdb).

To Reproduce
Steps to reproduce the behavior:

1. Setup a GDB server on a remote machine
2. Add a local launch file, that specifies miDebuggerServerAddress, with requestType set to attach.
3. Start debugging. Expecting to see a progress picker for a remote machine,