refactor: move Wasm test files to tests/all/cli_tests

Previously the inputs to `tests/all/cli_tests.rs` were contained in
`tests/wasm`. This change moves them to the more obvious
`tests/all/cli_tests` directory and updates the paths that point to
them.

tests/all/cli_tests/exit125_wasi_snapshot0.wat

@@ -0,0 +1,9 @@
+(module
+  (import "wasi_unstable" "proc_exit"
+    (func $__wasi_proc_exit (param i32)))
+  (memory (export "memory") 0)
+  (func $_start
+    (call $__wasi_proc_exit (i32.const 125))
+  )
+  (export "_start" (func $_start))
+)