[lldb/Interpreter] Add `interpreter.repeat-previous-command` setting

This patch introduces a new interpreter setting to prevent LLDB from
re-executing the previous command when passing an empty command.

This can be very useful when performing actions that requires a long
time to complete.

To preserve the original behaviour, the setting defaults to `true`.

rdar://74983516

Differential Revision: https://reviews.llvm.org/D97999



Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>