Fix local execution of external dynamically linked cc_* targets (#16253)

The fix for remote execution of external dynamically linked cc_* targets
in 95a5bfdc regressed local execution of such targets. This is fixed
by emitting two rpaths in the case of an external target.

Fixes https://github.com/bazelbuild/bazel/pull/16008#issuecomment-1224267553



Closes #16214.

PiperOrigin-RevId: 473706330
Change-Id: I500f8b1f79e4d994323651fbb5964a730f1136e3

Co-authored-by: kshyanashree <109167932+kshyanashree@users.noreply.github.com>