[Cherry-pick into next] [lldb] Make sure triple and SDK always match.

[adrian-prantl]

commit 9bc04d3df93fdd25c3c161fb07489d40f4eb5902
Author: Adrian Prantl <aprantl@apple.com>
Date:   Thu Dec 12 10:00:19 2024 -0800

    [lldb] Make sure triple and SDK always match.
    
    This is particularly important in simulator processes, when stopped in
    a symbol context that has no Swift, or no debug info, for example in
    libsystem_kernel. In that case we used to take the precise triple from
    the dylib (which would be macosx, not ios-simulator). Since we don’t
    find debug info in the current dylib we would select the SDK from the
    first dylib with debug info, which is ios-simulator.
    
    This patch avoids this situation by
    1. preferring the target triple if there is no Swift debug info
    2. ensuring that the SDK always matches the triple
    
    rdar://141173613