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Revert [CommandLine] Remove OptionCategory and SubCommand caches from the…

Description

Revert [CommandLine] Remove OptionCategory and SubCommand caches from the Option class.

This reverts r364134 (git commit a5b83bc9e3b8e8945b55068c762bd6c73621a4b0)

Caused errors in the asan bot, so the GeneralCategory global needs to
be changed to ManagedStatic.

Differential Revision: https://reviews.llvm.org/D62105