Add alloc to ciborium-io no_std am: 58a3496d69

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/rust/crates/ciborium-io/+/23106476

Change-Id: I7ce8cad0daaa4a4ed0e179c9eaf01ebf565feb5e
Signed-off-by: Automerger Merge Worker <[email protected]>