build: add tools for optimizing the Wasm binaries and translating to wat

After the addition of the rust-std-static-wasm32-wasi target, we're
able to compile the Rust programs to Wasm binaries. However, we're still
only able to handle the Wasm UDFs in the Text format, so we need a tool
to translate the .wasm files to .wat. Additionally, the .wasm files
generated by default are unnecessarily large, which can be helped
using wasm-opt and wasm-strip.
The tool for translating wasm to wat (wasm2wat), and the tool for
stripping the wasm binaries (wasm-strip) are included in the `wabt`
package, and the optimization tool (wasm-opt) is included in the
`binaryen` package. Both packages are added to install-dependencies.sh

Closes scylladb#13282

[avi: regenerate frozen toolchain]

Closes scylladb#13605

install-dependencies.sh

@@ -107,6 +107,8 @@ fedora_packages=(
     cargo
     rapidxml-devel
     rust-std-static-wasm32-wasi
+    wabt
+    binaryen
 )
 
 # lld is not available on s390x, see

tools/toolchain/image

@@ -1 +1 @@
-docker.io/scylladb/scylla-toolchain:fedora-37-20230320
+docker.io/scylladb/scylla-toolchain:fedora-37-20230424