fix(x-web): 当表单组件同时存在 modelValue 和 value 时，保持三端一致

[Otto-J]

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Size report

Path	Size
packages/size-check/dist/size-check.es.js	45.64 KB (0%)
packages/size-check/dist/style.css	2.88 KB (0%)
packages/uni-app/dist/uni-app.es.js	2.05 KB (0%)
packages/uni-h5-vue/dist/vue.runtime.esm.js	75.9 KB (0%)
packages/uni-mp-vue/dist/vue.runtime.esm.js	58.28 KB (0%)
packages/uni-mp-alipay/dist/uni.api.esm.js	12.91 KB (0%)
packages/uni-mp-alipay/dist/uni.mp.esm.js	7.54 KB (0%)
packages/uni-mp-baidu/dist/uni.api.esm.js	9.93 KB (0%)
packages/uni-mp-baidu/dist/uni.mp.esm.js	9.27 KB (0%)
packages/uni-mp-qq/dist/uni.api.esm.js	9.22 KB (0%)
packages/uni-mp-qq/dist/uni.mp.esm.js	7.22 KB (0%)
packages/uni-mp-toutiao/dist/uni.api.esm.js	9.37 KB (0%)
packages/uni-mp-toutiao/dist/uni.mp.esm.js	9.09 KB (0%)
packages/uni-mp-weixin/dist/uni.api.esm.js	10.04 KB (0%)
packages/uni-mp-weixin/dist/uni.mp.esm.js	7.34 KB (0%)
packages/uni-quickapp-webview/dist/uni.api.esm.js	9.18 KB (0%)
packages/uni-quickapp-webview/dist/uni.mp.esm.js	8.42 KB (0%)