meson: no longer skip dependencies when fuzzers are built locally

meson: no longer skip dependencies when fuzzers are built locally

to make it easier to fuzz code that uses external libraries like libelf/libdw.

The dependencies are skipped on OSS-Fuzz because they aren't available
at runtime if they aren't linked statically. This restriction can safely
be lifted when the fuzzers are built locally with all the dependencies
installed. As far as I know there is at least one fuzz target in the systemd
repository that can benefit from this: https://github.com/systemd/systemd/issues/11018