Use jl_dlsym with search_deps=1 for ccalls (#59560)
Reverts the behaviour change for ccalls with an explicit library
introduced by #58815. This is motivated by libraries like MPI, where the
dynamic library that actually defines a symbol is difficult to predict:
https://github.com/JuliaParallel/MPI.jl/issues/915#issuecomment-3293046616
