☂️ CMake migration completion

[zwoop]

Add active (and finished) issues / tasks here.

• [ ] Stuff + link
• [ ] Lots of little stuff
• [ ] More options for enabling / disabling specific plugins (-DENABLE_PLUGIN_LIST=... / -DDISABLE_PLUGIN_LIST= ... ??)/
• [ ] Traffic Server package config file (Jason / Chris)
• [ ] Traffic Server cmake config file (Jason / Chris)