Remove restrictions: - Only 1 WASM app at a time - Only 1 model at a time - `graph` and `graph-execution-context` are ignored Refer to previous document: https://github.com/bytecodealliance/wasm-micro-runtime/blob/e8d718096dc56d4b1aa66ec6cd04d6024ca1c6e2/core/iwasm/libraries/wasi-nn/README.md