depends: use LLVM/Clang 15.0.6 for macOS cross-compile

There is no x86_64 binaries for 15.0.7.

ci/test/00_setup_env_mac.sh

@@ -11,7 +11,7 @@ export SDK_URL=${SDK_URL:-https://bitcoincore.org/depends-sources/sdks}
 export CONTAINER_NAME=ci_macos_cross
 export CI_IMAGE_NAME_TAG="docker.io/ubuntu:22.04"
 export HOST=x86_64-apple-darwin
-export PACKAGES="cmake libz-dev libtinfo5 python3-setuptools xorriso"
+export PACKAGES="cmake libz-dev python3-setuptools xorriso"
 export XCODE_VERSION=12.2
 export XCODE_BUILD_ID=12B45b
 export RUN_UNIT_TESTS=false