llama.cpp

76888d20 - ci : upload xcframework artifact from ios-xcode-build job (#16010)

ci : upload xcframework artifact from ios-xcode-build job (#16010) This commit updates the github workflows build.yml file to include steps for uploading and downloading the xcframework artifact. The macos-latest-swift job now depends on the ios-xcode-build job and downloads the xcframework artifact produced by it. The motivation for this changes is that it takes a long time to build the xcframework and we are currently doing this twice in the workflow. With this change, we only build it once and reuse the artifact.