A long time ago, the -S option that we passed to clang --analyze ...

used to matter to tell clang to compile to assembly and then stop. But

modern versions of clang now ignore any code generation related flags

when --analyze is passed, so this -S option isn't needed anymore.
Clang 15 and newer is more noisy about unused arguments during

compilation, so it was complaining about the -S. This change removes

the option from our command.

Ran integration unit tests with clang 20 and saw that the unused

  argument warnings that were causing a couple tests to fail went away.