Correct cpu and os values of `local_config_cc_toolchains` targets
Correct cpu and os values of `local_config_cc_toolchains` targets

These aren't being used now, but some of them are clearly defined
incorrectly. Fix them now to avoid surprises in the future. Also change
`aarch64` to `arm64` since `aarch64` is an alias of `arm64`.

Closes #14844.

PiperOrigin-RevId: 433061989

katre/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,katre/bazel,katre/bazel,cushon/bazel,ButterflyNetwork/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,cushon/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,katre/bazel,cushon/bazel,cushon/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,bazelbuild/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel