floss: Update container image

Recent changes in rust_crates requires rustc 1.60. Also pulls in llvm-14
in the latest debian images.

Bug: 253298221
Tag: #floss
Test: ./floss/build/build-in-podman.py --image-tag floss:latest
Change-Id: Ia2d9a7ada99ada1a13570df00aaf131cf8e3d307