Use rust-benchmarks as Git submodule (#1115)

* remove rust based benchmarks

* remove remaining pieces of rust benchmarks

* add rust-benchmarks git submodule

* adjust benchmark code for new git submodule

* properly add git submodule

* fix instantiate benchmarks

.github/workflows/rust.yml

@@ -40,9 +40,6 @@ jobs:
             --exclude wasmi_cli
             --exclude wasmi_wasi
             --exclude wasmi_fuzz
-            --exclude wasmi_benches_tiny_keccak
-            --exclude wasmi_benches_reverse_complement
-            --exclude wasmi_benches_regex_redux
       - name: Build (wasm32)
         run: >-
           cargo build
@@ -55,9 +52,6 @@ jobs:
           --exclude wasmi_cli
           --exclude wasmi_wasi
           --exclude wasmi_fuzz
-          --exclude wasmi_benches_tiny_keccak
-          --exclude wasmi_benches_reverse_complement
-          --exclude wasmi_benches_regex_redux
 
   test-asan:
     name: Test (Address Sanitizer)

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "crates/wasmi/tests/spec/testsuite"]
 	path = crates/wasmi/tests/spec/testsuite
 	url = https://github.com/WebAssembly/testsuite.git
+[submodule "crates/wasmi/benches/rust"]
+	path = crates/wasmi/benches/rust
+	url = https://github.com/wasmi-labs/rust-benchmarks

Cargo.toml

@@ -5,10 +5,6 @@ members = [
     "crates/core",
     "crates/wasmi",
     "crates/wasi",
-    "crates/wasmi/benches/rust/tiny_keccak",
-    "crates/wasmi/benches/rust/reverse_complement",
-    "crates/wasmi/benches/rust/regex_redux",
-    "crates/wasmi/benches/rust/build",
     "fuzz",
 ]
 exclude = []