[mlir] Fix build breakage on some systems

Some includes were shuffled around in LLVM support headers, causing
`<vector>` to no longer be included in certain files. Depending on the
system stdlib, the header might not transitively get included. Adding
`<vector>` to `DialectInterface.h` fixes a build breakage on some
systems

Author: Mogball

mlir/include/mlir/IR/DialectInterface.h

@@ -12,6 +12,7 @@
 #include "mlir/Support/TypeID.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/STLExtras.h"
+#include <vector>
 
 namespace mlir {
 class Dialect;