Wasm-builder 3.0 (#7532)

* Build every wasm crate in its own project with wasm-builder

Building all wasm crates in one workspace was a nice idea, however it
just introduced problems:

1. We needed to prune old members, but this didn't worked for old git
deps.
2. We locked the whole wasm workspace while building one crate. This
could lead to infinitely locking the workspace on a crash.

Now we just build every crate in its own project, this means we will
build the dependencies multiple times. While building the dependencies
multiple times, we still decrease the build time by around 30 seconds
for Polkadot and Substrate because of the new parallelism ;)

* Remove the requirement on wasm-builder-runner

This removes the requirement on wasm-builder-runner by using the new
`build_dep` feature of cargo. We use nightly anyway and that enables us
to use this feature. This solves the problem of not mixing
build/proc-macro deps with normal deps. By doing this we get rid off
this complicated project structure and can depend directly on
`wasm-builder`. This also removes all the code from wasm-builder-runner
and mentions that it is deprecated.

* Copy the `Cargo.lock` to the correct folder

* Remove wasm-builder-runner

* Update docs

* Fix deterministic check

Modified-by: Bastian Köcher <git@kchr.de>

* Try to make the ui test happy

* Switch to `SKIP_WASM_BUILD`

* Rename `SKIP_WASM_BINARY` to the correct name...

* Update utils/wasm-builder/src/builder.rs

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

* Update utils/wasm-builder/src/builder.rs

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

substrate/test-utils/runtime/src/lib.rs

@@ -66,8 +66,8 @@ pub type AuraId = sp_consensus_aura::sr25519::AuthorityId;
 #[cfg(feature = "std")]
 include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
 
+/// Wasm binary unwrapped. If built with `SKIP_WASM_BUILD`, the function panics.
 #[cfg(feature = "std")]
-/// Wasm binary unwrapped. If built with `BUILD_DUMMY_WASM_BINARY`, the function panics.
 pub fn wasm_binary_unwrap() -> &'static [u8] {
 	WASM_BINARY.expect("Development wasm binary is not available. Testing is only \
 						supported with the flag disabled.")