fix: treeSelect arrow

[PengYYYYY]

🤔 这个 PR 的性质是？

• 日常 bug 修复

🔗 相关 Issue

💡 需求背景和解决方案

chore(demos): 修复 demo 样式问题，移除组件库内无用代码，替换组件对常量config的读取

📝 更新日志

• fix(treeSelect): 修复右侧箭头状态与清除回掉
• fix(input): 修复 suffix 渲染问题
• fix(select-input)：修复 clearicon 展示问题
• fix(popup)：修复 overlayStyle 展示问题

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[github-actions]

Size Change: +347 B (0%)

Total Size: 657 kB

Filename	Size	Change
./dist/tdesign.css	43.3 kB	+71 B (0%)
./dist/tdesign.js	367 kB	+45 B (0%)
./dist/tdesign.min.css	38.4 kB	+61 B (0%)
./dist/tdesign.min.js	209 kB	+170 B (0%)

[github-actions]

[github-actions]

Size Change: +347 B (0%)

Total Size: 657 kB

Filename	Size	Change
./dist/tdesign.css	43.3 kB	+71 B (0%)
./dist/tdesign.js	367 kB	+45 B (0%)
./dist/tdesign.min.css	38.4 kB	+61 B (0%)
./dist/tdesign.min.js	209 kB	+170 B (0%)

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (develop@9b251fe). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             develop     #679   +/-   ##
==========================================
  Coverage           ?   60.91%           
==========================================
  Files              ?      402           
  Lines              ?    13895           
  Branches           ?     2607           
==========================================
  Hits               ?     8464           
  Misses             ?     5192           
  Partials           ?      239           

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[github-actions]

Size Change: +347 B (0%)

Total Size: 657 kB

Filename	Size	Change
./dist/tdesign.css	43.3 kB	+71 B (0%)
./dist/tdesign.js	367 kB	+45 B (0%)
./dist/tdesign.min.css	38.4 kB	+61 B (0%)
./dist/tdesign.min.js	209 kB	+170 B (0%)