Original commit description: [LLD] Remove global state in lld/COFF This patch removes globals from the lldCOFF library, by moving globals into a context class (COFFLinkingContext) and passing it around wherever it's needed. See https://lists.llvm.org/pipermail/llvm-dev/2021-June/151184.html for context about removing globals from LLD. I also haven't moved the `driver` or `config` variables yet. Differential Revision: https://reviews.llvm.org/D109634 This reverts commit a2fd05ada9030eab2258fff25e77a05adccae128. Original commits were b4fa71eed34d967195514fe9b0a5211fca2bc5bc and e03c7e367adb8f228332e3c2ef8f45484597b719.