fix(pro:search): mutiple search filed validation error

[sallerli1]

PR Checklist

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• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

当searchField允许重复，即配置了multiple时，第一个之后的搜索项合法性判断不正确

例如：第一个关键字会校验非空，空的会被删除掉，第二个关键字没有校验

What is the new behavior?

修复以上问题

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[cr-gpt]

the code review:

1. In the first part of the code, it is important to check that the segmentValues are not undefined or null. This is a good way to prevent bugs from happening and make sure that the code runs smoothly.
2. The second part of the code checks whether there are more than one searchState of the same field key and if multiple searchStates are allowed from the field config. This allows the code to be able to handle cases with multiple searchStates of the same field key.
3. The last part of the code validates the searchState by checking that all segmentValues are not nil. This ensures that all validations are passed before the code is executed.

Overall, the code looks good and should be able to handle different cases without any issues. However, there might be some edge cases that are not addressed and should be considered in the future.

[codecov]

Codecov Report

Merging #1475 (6587941) into main (4523705) will not change coverage.
The diff coverage is n/a.

❗ Current head 6587941 differs from pull request most recent head af87ad8. Consider uploading reports for the commit af87ad8 to get more accurate results

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