[lldb][windows] add sibling-import fallback to LoadImage helper (#197218) `PlatformWindows::DoLoadImage` injects `__lldb_LoadLibraryHelper` which registers each caller-supplied search path via `AddDllDirectory()` and calls `LoadLibraryExW(name, nullptr, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS)`. In practice however, this flow fails for a common layout where a DLL lives next to its sibling imports. LoadLibraryExW returns ERROR_CANT_RESOLVE_FILENAME and the load is reported as unrecoverable, even though every required DLL is present in one of the search paths. This patch adds a fallback after the first `LoadLibraryExW(name, nullptr, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS)` call: if it fails, iterate the caller-provided search paths and try `LoadLibraryExW(path, nullptr, LOAD_WITH_ALTERED_SEARCH_PATH)`. `LOAD_WITH_ALTERED_SEARCH_PATH` instructs the Windows loader to add the DLL's own directory to the dependency search. See https://learn.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-loadlibraryexa. --------- Co-authored-by: Nerixyz <nero.9@hotmail.de>
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