By defining our own build script, we gain complete clarity and control over how
the WASM is built. This also removes the need to patch the upstream due to it
allowing pollution of the environment variables from the host.
Notable appreciation is given to
https://github.com/rust-lang/rust/issues/145491 for identifying an issue
encountered here, with the associated PR clarifying the necessary flags for the
linker to fix this.
Additionally, optimizes the build process a bit via leaving only the runtime
(and `busybox`) in the final image, and additionally building the runtime
without `std` (as we solely need the WASM blob from this process).
Consensus has been nuked for an AcceptAny currently routed throough PoW
(when it doesn't have to be, doing so just took care of a few pieces of
leg work).
Updates AGPL handling.
