Baseline: 609aca860a91b26da7a9a6f90c98e3a67d0b4023

Cherry picks:

   + babc5c3be6227447018290677c1dd0e1ea1bf6cc:
     Remove mention of non-existent `--visionos_sdk_version` flag
   + 6288eb92b228ee25f3a1202d26d4b1c9bc25d62a:
     Fix capitalization of Apple platforms, Xcode, “SDK”, and
     “OS”
   + 0f760395e04cb0accb912be128b4f363663e8d30:
     Fix bzl error when the Xcode isn't available remotely but others
     are

This release contains contributions from many people at Google, as well as Brentley Jones, Fabian Meumertzheim.