修复自动生成列时CheckBoxList数据绑定中的一处bug

[Tony-ST0754]

fix:修复自动生成列为CheckBoxList组件时，数据绑定的Bug，导致每次只能单选的问题

Link issues

fixes #8265

问题描述 / Problem Description

当Table组件中绑定的数据采用自动生成列时，有字段属性对应生成为CheckBoxList组件时，会出现每次只能选中一个，关掉编辑弹窗后，才能再次 选中/取消 另一个

根本原因 / Root Cause

在EditorForm组件中自动生成编辑窗体的数据模板时，对CheckBoxList组件的Items赋值时采用了克隆，因此导致每次会创建新的实例

解决方案 / Solution

修改Utility.cs中自动生成编辑弹窗中组件的方法，代码如下所示：

public static void CreateComponentByFieldType(this RenderTreeBuilder builder, ComponentBase component, IEditorItem item, object model, ItemChangedType changedType = ItemChangedType.Update, bool isSearch = false, ILookupService? lookupService = null, bool? skipValidate = null)
{
    // ....省略以上代码.....
   if (IsCheckboxList(fieldType, componentType) && item.Items != null)
   {
       builder.AddAttribute(90, nameof(CheckboxList<>.Items), item.Items);
   }
   // ....省略以下代码.....
}

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Bug Fixes:

• Resolve CheckboxList in auto-generated columns always creating new item instances, which restricted selection to a single item.

[sourcery-ai]

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[sourcery-ai]

Hey - I've left some high level feedback:

• Now that the CheckboxList uses the original item.Items instance instead of a clone, consider making Items immutable (e.g., using a read-only collection) or clearly constraining external mutation to avoid subtle side effects from shared state across components.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Now that the CheckboxList uses the original item.Items instance instead of a clone, consider making Items immutable (e.g., using a read-only collection) or clearly constraining external mutation to avoid subtle side effects from shared state across components.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e05c3d2) to head (f0a8775).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #8270   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          769       769           
  Lines        34436     34436           
=========================================
  Hits         34436     34436           

Flag	Coverage Δ
BB	100.00% <100.00%> (?)

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