[TSan] Fix deadlocks during TSan error reporting on Apple platforms (#151495) Changes: Apple only: * Move OutputReport (and thus symbolization) after the locked region when reporting. * ScopedReportBase constructor requires the thread_registry lock to be held, so the regions where ScopedReports get created must be inside the locked region. * Bail early from MemoryAccess if we are symbolizing. Other platforms should behave as before, outputting reports while the locks are held. This is a follow up to https://github.com/llvm/llvm-project/pull/151120, which delayed symbolization of ScopedReports. rdar://152829396
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