Fixes#124756 by removing the concept of `Version.unknown`.
`Version` fields that needed the ability to represent an unknown version have been made nullable. Assigning `null` to them represents an unknown version.
* [tools]some ui polish for build ipa validation
* do not print out a few success validations
* rename installed type to success for more general usage
* forgot nit after reverting custom validation types and re-use doctor types
Move the intellij validator to its own file, and split off the tests. Remove globals from each, and remove dependency on a real jar/filesystem by creating a minimal version of the manifest xml and setting it up in the memory file system.
#47161
