samples/terminate: Add a sample to demonstrate wasm_runtime_terminate (#3043)

This is basically a modified copy of the "shared-module" example.

samples/terminate/wasm-apps/testapp.wat

@@ -0,0 +1,22 @@
+;; Copyright (C) 2024 YAMAMOTO Takashi
+;; SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+(module
+  (func $fd_read (import "wasi_snapshot_preview1" "fd_read") (param i32 i32 i32 i32) (result i32))
+  (func (export "_start")
+    ;; read from FD 0
+    i32.const 100 ;; iov_base
+    i32.const 200 ;; buffer
+    i32.store
+    i32.const 104 ;; iov_len
+    i32.const 1
+    i32.store
+    i32.const 0 ;; fd 0
+    i32.const 100 ;; iov_base
+    i32.const 1   ;; iov count
+    i32.const 300 ;; retp (out)
+    call $fd_read
+    unreachable
+  )
+  (memory (export "memory") 1)
+)