Option for other delimiters for CSV imports

[YetAnotherGerrit]

Infos:

• Used Zammad version: any
• Installation method (source, package, ..): any
• Operating system: any
• Database + version: any
• Elasticsearch version: any
• Browser + version: any
• Ticket#10106530

Expected behavior:

• On user/organization-import you can select the delimiter used in your csv-file. Available options are comma, semicolon and tabulator.

Actual behavior:

• User/organization-import only works with comma delimited csv-files. German Excel for example has a hard time exporting to it. You need an advanced user to pull this off.