8.2.0

CHANGES:

• Install system packages required by OCaml in the ocaml stage,
  starting with OCaml 5.1 and libzstd.
  (@MisterDA #149, review by @kit-ty-kate)
• Add OracleLinux 9. (@MisterDA #155)
• Optimize and fix Linux package install.
  (@MisterDA #147, #151, #153, #154, review by @kit-ty-kate)
• Switch to ocaml-opam/opam-repository-mingw#sunset for Windows images. (@MisterDA #152)
• Use DockerHub user risvc64/ubuntu. (@MisterDA, #150)
• Various LCU Updates (@mtelvers #144 #136 #135)
• Support mounts, networks, and security parameters in RUN
  commands, add buildkit_syntax helper function.
  (@MisterDA, @edwintorok, #137, #139, review by @edwintorok)
• Build and install opam master from source in Windows images.
  (@MisterDA #140, #142, #143)
• Include the ocaml-beta-repository in the images. (@kit-ty-kate #132, review by @MisterDA)
• Add OpenSUSE 15.4, deprecate OpenSUSE 15.3. (@MisterDA #138)
• Update to bubblewrap 0.8.0. (@MisterDA #131 #148)
• Add Alpine 3.17 (3.16 is now tier 2 and 3.15 is deprecated). Remove
  libexecinfo-dev from the list of apk packages as it is no longer
  available. Its symbols are only used in OCaml's self tests.
  (@MisterDA #129, #130)
• Fix location of Debian exotic architecture images (@dra27 #134)
• Fix passing of --platform to all stages of the Dockerfiles (@dra27 #134)