[2.3.0] Checkmk Werk 16348 created: Support Diagnostics: Use pip3

Title: Support Diagnostics: Use pip3 Class: fix Compatible: compat Component: wato Date: 1701851869 Edition: cre Level: 1 Version: 2.3.0b1 When creating a Support Diagnowtics dump, the information about the installed Python modules was collected using pip. This actually collected information about the OS' Python environment, not about the one in the site context. Sometimes, it caused a crash, when there was no pip installed. Now, pip3 is used, which is built-in to the Checkmk Site.