[MC] Disable MCAssembler based constant folding for DwarfDebug

Related to the poor performance of MCAssembler based constant folding
(see `bool MCExpr::evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const` and
`AttemptToFoldSymbolOffsetDifference`),
commit 9500a5d (#91082) caused -O0 -g
compile time regression.

9500a5d special cased .eh_frame FDE
emitting. This patch adds a special case to .debug_* emitting as well to
mitigate the rest regression.

The MCAssembler based constant folding strategy should be improved to
remove the two special cases.

Author: MaskRay

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -2463,11 +2463,15 @@ bool AsmPrinter::doFinalization(Module &M) {
     emitGlobalIFunc(M, IFunc);
 
   // Finalize debug and EH information.
+  // Defer MCAssembler based constant folding due to a performance issue. The
+  // label differences will be evaluated at write time.
+  OutStreamer->setUseAssemblerInfoForParsing(false);
   for (const HandlerInfo &HI : Handlers) {
     NamedRegionTimer T(HI.TimerName, HI.TimerDescription, HI.TimerGroupName,
                        HI.TimerGroupDescription, TimePassesIsEnabled);
     HI.Handler->endModule();
   }
+  OutStreamer->setUseAssemblerInfoForParsing(true);
 
   // This deletes all the ephemeral handlers that AsmPrinter added, while
   // keeping all the user-added handlers alive until the AsmPrinter is