[lldb] Properly handle locate module callback when Target change arch (#143793)

Since this PR: #141670 We
started to override the Platform/Arch for a target if needed. However we
may have already registered locate module callback with the old
platform.

This PR will move the locate module callback to the new Platform
whenever Target changes architecture.

Co-authored-by: George Hu <[email protected]>

Author: GeorgeHuyubo

lldb/source/Target/Target.cpp

@@ -1706,6 +1706,8 @@ bool Target::SetArchitecture(const ArchSpec &arch_spec, bool set_platform,
         if (PlatformSP arch_platform_sp =
                 GetDebugger().GetPlatformList().GetOrCreate(other, {},
                                                             &platform_arch)) {
+          arch_platform_sp->SetLocateModuleCallback(
+              platform_sp->GetLocateModuleCallback());
           SetPlatform(arch_platform_sp);
           if (platform_arch.IsValid())
             other = platform_arch;