Normalize diacritics in segment search

[sgiehl]

Description:

It has been reported that diacritics are causing problems when using the segment search.

If a segment names e.g. contains letter like Çàêč or similar, those segment would not be found when searching for caec.
This makes it hard in some languages to search for segments.

This PR changes the segment search, so it compares the search term with the original segment name, but also with the normalized segment name. This way you can search for a, but would find a and à, while searching for à, would only find à

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed

[github-actions]

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[github-actions]

This PR was last updated more than one month ago, maybe it's time to close it. Please check if there is anything we still can do or close this PR. ping @matomo-org/core-reviewers