Werk #13746: Support Diagnostics: Extend and improve functionality

The usage of the GUI was improved. There's a separate section "Checkmk Log files" now, the component "Business Intelligence" was added and the inline help now contains a description of each file. The sctructure of the tar.gz file was slightly changed and the following information is now always included in the dump: Checkmk performance data (number of helper processes, current core statistics), HW information (CPU and Memory), and the environment variables of the site user.

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