`cabal test` and `cabal benchmark` reportedly don't work for wasm output

**Describe the bug**
I have heard reports that `cabal test` doesn't work with wasm cross-compilers because it expects to be able to run an executable directly, but you need to use a wasm runner such as `wasmtime` to run them. This is expected to also fail with `cabal benchmark` for the same reason.

**To Reproduce**
I don't have a reproducer; this is from a discussion on the FP Discord.

**Expected behavior**
`cabal test` should be able to run a wasm binary.

**Additional context**
I suspect that support for wasm output (and possibly JS) will require specifying a runner to use. This may also be useful for cross-compilers in general, where the runner would use a provisioned qemu or send the binary to an embedded processor (Raspberry Pi, RISC-V, etc.).