test-runtime: GenesisBuilder runtime API impl + tests (#14310)

* test-runtime: GenesisBuilder runtime API impl + tests

This PR provides implementation of `GenesisBuilder` API for `substrate-test-runtime`, can be considered as reference imiplementation for other runtimes.
The `GenesisBuilder` implementation is gated by `gensis-config` feature.

Tested scenarios:
- default `GenesisConfig` to JSON blob,
- deserialization of `GenesisConfig` from custom JSON, and storing its keys into the Storage (genesis storage creation).
- creation of genesis storage using partial JSON definition,
- checking if invalid/renamed JSON files causes the runtime to panic,

* missing file added

* client: GenesisBuilder helper added

* feature renamed: genesis-config -> genesis-builder

* Update Cargo.toml

* Update Cargo.toml

* Update Cargo.toml

* Update Cargo.toml

* redundant function removed

* genesis builder helper: introduced RuntimeGenesisBuild

* test-runtime: get rid of unused T

* redundant bound removed

* helper: use GenesisBuild again

* tests adjusted for on_genesis

* test-runtime: support for BuildGenesisConfig

* helper: BuildGenesisConfig support

* Update client/genesis-builder/src/lib.rs

Co-authored-by: Davide Galassi <davxy@datawok.net>

* Update test-utils/runtime/src/test_json/readme.md

Co-authored-by: Davide Galassi <davxy@datawok.net>

* Update test-utils/runtime/src/test_json/readme.md

Co-authored-by: Davide Galassi <davxy@datawok.net>

* Update test-utils/runtime/src/genesismap.rs

Co-authored-by: Davide Galassi <davxy@datawok.net>

* jsons are now human-friendly

* fix

* improvements

* jsons fixed

* helper: no_defaults added

* test-runtime: no_defaults added

* test-runtime: patching fn removed

* helper: patching fn removed

* helper: moved to frame_support

* test-runtime: fixes

* Cargo.lock updated

* fmt + naming

* test-runtime: WasmExecutor used

* helper / test-runtime: struct removed

* test-runtime: merge fixes

* Cargo.lock + test-utils/runtime/Cargo.toml updated

* doc fixed

* client/rpc: test fixed (new rt api)

* client/rpc-spec-v2: test fix

* doc fix

* test-runtime: disable-genesis-builder feature

* fix

* fix

* ".git/.scripts/commands/fmt/fmt.sh"

* test-runtime: rerun added to build script

---------

Co-authored-by: Davide Galassi <davxy@datawok.net>
Co-authored-by: parity-processbot <>

substrate/test-utils/runtime/build.rs

@@ -15,6 +15,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+const BUILD_NO_GENESIS_BUILDER_SUPPORT_ENV: &str = "BUILD_NO_GENESIS_BUILDER_SUPPORT";
+
 fn main() {
 	#[cfg(feature = "std")]
 	{
@@ -29,6 +31,19 @@ fn main() {
 			.build();
 	}
 
+	#[cfg(feature = "std")]
+	if std::env::var(BUILD_NO_GENESIS_BUILDER_SUPPORT_ENV).is_ok() {
+		substrate_wasm_builder::WasmBuilder::new()
+			.with_current_project()
+			.export_heap_base()
+			.append_to_rust_flags("-Clink-arg=-zstack-size=1048576")
+			.set_file_name("wasm_binary_no_genesis_builder")
+			.import_memory()
+			.enable_feature("disable-genesis-builder")
+			.build();
+	}
+	println!("cargo:rerun-if-env-changed={}", BUILD_NO_GENESIS_BUILDER_SUPPORT_ENV);
+
 	#[cfg(feature = "std")]
 	{
 		substrate_wasm_builder::WasmBuilder::new()