[lldb] Skip TestStepUntilAPI on !x86_64, !aarch64

The compiler does not support this feature on other architectures.

[lldb] Fix SBThread::StepOverUntil for discontinuous functions (#123046)

I think the only issue here was that we would erroneously consider
functions which are "in the middle" of the function were s

[lldb] Fix SBThread::StepOverUntil for discontinuous functions (#123046)

I think the only issue here was that we would erroneously consider
functions which are "in the middle" of the function were stepping to as
a part of the function, and would try to step into them (likely stepping
out of the function instead) instead of giving up early.

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