feat: use mold and cargo sonic

[GuillaumeDeconinck]

• Use mold for linking on Linux, as it's faster than the default and has been stable for a while now
• Use cargo-sonic for generating multiple binaries when releasing instead of only one
  • This allows to generate optimized binaries based on the CPU target, at the cost of compiling time
    • E.g. a default generic ARM binary, and a binary that uses better/faster instructions available on Graviton AWS CPUs