[lldb-dap] Support breakpoints in the launch and attach helpers

[JDevlieghere]

Extend the launch and attach helpers in DAPTestCaseBase to take breakpoints that we set during the launch/attach sequence. Between the initialize and configurationDone requests, lldb-dap will handle the following requests:

• setBreakpoints
• setFunctionBreakpoints
• setExceptionBreakpoints

This should eliminate the need to launch and attach with stopOnEntry=True in order to set initial breakpoints.

[llvmbot]

@llvm/issue-subscribers-lldb-dap

Author: Jonas Devlieghere (JDevlieghere)

Extend the `launch` and `attach` helpers in `DAPTestCaseBase` to take breakpoints that we set during the launch/attach sequence. Between the `initialize` and `configurationDone` requests, lldb-dap will handle the following requests:

• setBreakpoints
• setFunctionBreakpoints
• setExceptionBreakpoints

This should eliminate the need to launch and attach with stopOnEntry=True in order to set initial breakpoints.