fix(components): [cascader] The height changes as you multiple select

[GuoJikun]

When a component has multiple selection enabled, the height changes when one of the items is selected

closed #13017

Please make sure these boxes are checked before submitting your PR, thank you!

• Make sure you follow contributing guide English | (中文 | Español | Français).
• Make sure you are merging your commits to dev branch.
• Add some descriptions and refer to relative issues for your PR.

Description

🤖 Generated by Copilot at 1bc0d2a

Reduced the height of the input element in cascader.vue to prevent scrolling issues with tags. This fixed issue #13107.

Related Issue

Fixes #13107.

Explanation of Changes

🤖 Generated by Copilot at 1bc0d2a

• Reduce the offsetHeight of the inputInner element to prevent vertical scrolling with multiple tags (style(theme-chalk): change border-left:0 to border-left-color:transparent #13107) (link)

[pull-request-triage]

👋 @GuoJikun, seems like this is your first time contribution to element-plus.

• Please make sure that you have read our guidelines and code of conduct before making a contribution.
• You can comment with /label Components:[component_name] to add a label for which component you are working on.
• You may join our for staying tuned.

[github-actions]

[github-actions]

Hello @GuoJikun, thank you for contributing to element-plus, please see our guideline to see how to make contribution

[GuoJikun]

/label Components:[cascader]

[GuoJikun]

/label Components:cascader

[GuoJikun]

Can someone handle this?