[lldb/test] Split Scripted Process test in multiple tests (NFC)

This splits the scripted process tests to be able to run in parallel
since some of test functions can take a very long time to run.

This also disables debug info testing.

Differential Revision: https://reviews.llvm.org/D118513



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