configure: temporarily disable wasm support for aarch64
configure: temporarily disable wasm support for aarch64

There seems to be a problem with libwasmtime.a dependency on aarch64,
causing occasional segfaults during tests - specifically, tests
which exercise the path for halting wasm execution due to fuel
exhaustion. As a temporary measure, wasm is disabled on this
architecture to unblock the flow.

Refs #9387

Closes #9414

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla