[lldb/API] Move SBCommandInterpreterRunOption in its own header. (NFC)

Currently, `SBCommandInterpreterRunOptions` is defined in
`SBCommandInterpreter.h`. Given that the options are always passed by
reference, a forward declaration is sufficient.

That's not the case for `SBCommandInterpreterRunResults`, which we need
for a new overload for `RunCommandInterpreter` and that returns this new
class by value. We can't include `SBCommandInterpreter.h` because
`SBCommandInterpreter::GetDebugger()` returns SBDebugger by value and
therefore needs a full definition.

This patch moves the definition of `SBCommandInterpreterRunOptions` into
a new header. In a later patch,  `SBCommandInterpreterRunResults` will
be defined in there as well, solving the aforementioned problem.

Differential revision: https://reviews.llvm.org/D79115