[mlir] Use `interleave` in `printOperands` (NFC)

[Mogball]

Summary

Instead of reimplementing it.

[rriddle]

Nice. (Feel free to submit stuff like this directly)

mlir/include/mlir/IR/OpImplementation.h

public:
   template <typename ContainerType>
   void printOperands(const ContainerType &container) {
     printOperands(container.begin(), container.end());
   }
 
   /// Print a comma separated list of operands.
   template <typename IteratorType>
   void printOperands(IteratorType it, IteratorType end) {
-    if (it == end)
-      return;
-    printOperand(*it);
-    for (++it; it != end; ++it) {
-      getStream() << ", ";
-      printOperand(*it);
-    }
+    llvm::interleaveComma(llvm::make_range(it, end), getStream(),
+                          [this](Value value) { printOperand(value); });
   }
 
   /// Print the given successor.
   virtual void printSuccessor(Block *successor) = 0;
 
   /// Print the successor and its operands.
   virtual void printSuccessorAndUseList(Block *successor,
                                         ValueRange succOperands) = 0;