* Ensure tag operations are case insensitve on insert across database types.
* Ensure tags provided in a single property are case insensitively distinct when saving the tags and relationships.
* Update src/Umbraco.Infrastructure/Persistence/Repositories/Implement/TagRepository.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Handle case sensitivity on insert with tag groups too.
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>