[Bug]: The SourceMapDevToolPlugin fileContext does not meet expectations

[idy1000]

System Info

System:
OS: macOS 13.6.3
CPU: (8) x64 Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz
Memory: 42.59 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 18.16.0 - ~/.nvm/versions/node/v18.16.0/bin/node
Yarn: 1.22.17 - /usr/local/bin/yarn
npm: 9.5.1 - ~/.nvm/versions/node/v18.16.0/bin/npm
pnpm: 7.33.1 - ~/.nvm/versions/node/v14.15.3/bin/pnpm
Watchman: 2021.06.07.00 - /usr/local/bin/watchman
Browsers:
Chrome: 131.0.6778.205
Safari: 16.6
npmPackages:
@rspack/cli: ^1.1.8 => 1.1.8
@rspack/core: ^1.1.8 => 1.1.8
@rspack/plugin-react-refresh: 1.0.0 => 1.0.0

Details

配置见复现路径，产物的文件结构如图

预期是没有dist/js/main_9ba8f56720d7142d.js文件，且dist/assets/js/main_9ba8f56720d7142d.js中的sourceMappingURL为带域名的地址：http://test.com/sourcemaps/js/main_9ba8f56720d7142d.js.map
webpack同样的配置是符合预期的

把fileContext注释是符合预期的

Reproduce link

No response

Reproduce Steps

1. 创建项目：npx create-rspack --dir my-project --template react
2. 修改配置：

{
    // ...
    output: {
        filename: 'assets/js/[name]_[contenthash].js',
    },
    plugins: [
        new rspack.SourceMapDevToolPlugin({
            test: [/\.(js|jsx|ts|tsx)$/],
            filename: `sourcemaps/[file].map`,
            publicPath: 'http://test.com/',
            fileContext: 'assets',
        }),
        // ...
    ]
}

3. npm run build