[BazelDeps] Adding RPATH to linkopts

[franramirez688]

Changelog: Fix: [BazelDeps] Adding RPATH flag in linkopts field for dynamic builds and UNIX systems.
Docs: omit
Closes: #19135
Closes: #19190

Rationale

For instance, the csm library creates these binaries:

.
├── libcsmapi.3.0.4.dylib
├── libcsmapi.3.dylib -> libcsmapi.3.0.4.dylib
└── libcsmapi.dylib -> libcsmapi.3.dylib

And the csm/BUILD.bazel file has this:

shared_library = "lib/libcsmapi.dylib"

Any application linking with that will show this:

$ otool -L bazel-bin/main/demo
bazel-bin/main/demo:
    @rpath/libcsmapi.3.dylib (compatibility version 3.0.0, current version 3.0.4)

It points to the symlink, but Bazel only copies the matched library into its own cache (libcsmapi.dylib). Adding the rpath flag, we solve that problem.

[memsharded]

I didn't know that -rpath link flag could be used for this symlink purpose, so far I thought it was mostly for transitive shared libs linkage.
So probably I don't know enough to validate if this is ok and safe, or it could have some issues.

Otherwise, looks good to me!