[leveldb] Fix target "Threads::Threads" was not found

[LilyWangLL]

Fixes #23099
Fix error:

1> [CMake] CMake Error at /Users/xyz/vcpkg/scripts/buildsystems/vcpkg.cmake:558 (_add_executable):
1> [CMake]   Target "testleveldb" links to target "Threads::Threads" but the target was
1> [CMake]   not found.  Perhaps a find_package() call is missing for an IMPORTED
1> [CMake]   target, or an ALIAS target is missing?

[JackBoosY]

Sorry for the typo, I always make this mistake.

[vicroms]

Closing and re-opening to hopefully whack clabot awake