[TF] install_name_dir workaround for Python and TensorFlow modules. (#25328)
`install_name_dir` for the standard library has been changed from
@rpath to /usr/lib/swift in https://github.com/apple/swift/pull/24382.
This patch resolves linker issues on macOS:
"Library not loaded: /usr/lib/swift/libswiftTensorFlow.dylib"
See https://github.com/tensorflow/swift-apis/pull/136 for more information.