* Fixes issues when starting the worldserver not in the bin directory
or the CMAKE_INSTALL_PREFIX directory using the -c option.
(cherry picked from commit 86b0fcf67a)
* Adds CMAKE_COMMAND and CMAKE_BINARY_DIR to revision_data.h
* Move the source and mysql exe path handling out of the DBUpdater.
* Make some Config methods const for correctness.
* Remove C & CXX flags from revision_data.h
(was unused and didn't capture all cxx vars)
* Reorder the link order to prevent `ld` from ignoring the file
* Ref #15671