`config->priorities` has been used to hold the intermediate state during the construction of the order in which sections should be laid out. This is not a good place to hold this state since the intermediate state is not a "configuration" for LLD. It should be encapsulated in a class for building a mapping from section to priority (which I created in this diff as the `PriorityBuilder` class).
The same thing is being done for `config->callGraphProfile`.
Reviewed By: #lld-macho, int3
Differential Revision: https://reviews.llvm.org/D122156
f858fba631