Revert "[MC] Make .pseudo_probe sections deterministic after D91878"

This reverts commit c8fd0cf.

Caused heap-use-after-free

Author: MaskRay

llvm/include/llvm/MC/MCPseudoProbe.h

@@ -55,7 +55,6 @@
 #define LLVM_MC_MCPSEUDOPROBE_H
 
 #include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/IR/PseudoProbe.h"
@@ -300,7 +299,8 @@ class MCPseudoProbeSections {
     MCProbeDivisions[FuncSym].addPseudoProbe(Probe, InlineStack);
   }
 
-  using MCProbeDivisionMap = MapVector<MCSymbol *, MCPseudoProbeInlineTree>;
+  // TODO: Sort by getOrdinal to ensure a determinstic section order
+  using MCProbeDivisionMap = std::map<MCSymbol *, MCPseudoProbeInlineTree>;
 
 private:
   // A collection of MCPseudoProbe for each function. The MCPseudoProbes are