[MERGE #6108 @LouisLaf] Fix ChakraFull CI

Merge pull request #6108 from LouisLaf:ophelper

When coalesing this pattern:
L1:  <helper>
L2:

Mark the remaining label as non-helper.

Author: LouisLaf

lib/Backend/Lower.cpp

@@ -10414,7 +10414,7 @@ Lowerer::LowerEqualityBranch(IR::Instr* instr, IR::JnHelperMethod helper)
         {
             if (isStrictCompare)
             {
-                LowerStrictBrOrCm(instr, helper, false, true /* isBranch */, true);
+                LowerStrictBrOrCm(instr, helper, false, true /* isBranch */, false);
             }
             else
             {

lib/Backend/Peeps.cpp

@@ -453,6 +453,7 @@ Peeps::PeepBranch(IR::BranchInstr *branchInstr, bool *const peepedRef)
             else
             {
                 IR::Instr *instrTmp = instrSkip;
+                instrNext->AsLabelInstr()->isOpHelper = instrSkip->AsLabelInstr()->isOpHelper;
                 instrSkip = instrNext;
                 instrNext = instrTmp;
             }