Revert valueflow split

[pfultz2]

Revert most of the moving passes out of valueflow.cpp. Splitting up valueflow should be organized differently.

[pfultz2]

The error in CI is unrelated to this PR, and is a failure with getting qt packages on windows:

INFO    : aqtinstall(aqt) v3.1.18 on Python 3.11.9 [CPython MSC v.1938 64 bit (AMD64)]
WARNING : Specified Qt version "6.7.3" did not exist when this version of aqtinstall was released. This may not install properly, but we will try our best.
WARNING : Specified target combination "windows desktop win64_msvc2022_64" did not exist when this version of aqtinstall was released. This may not install properly, but we will try our best.
ERROR   : The packages ['qt_base', 'qtcharts'] were not found while parsing XML of package information!
==============================Suggested follow-up:==============================
* Please use 'aqt list-qt windows desktop --arch 6.7.3' to show architectures available.
* Please use 'aqt list-qt windows desktop --modules 6.7.3 <arch>' to show modules available.

[pfultz2]

This same failure is on the main branch.