[bazel] Add //mlir:IR to Support for #144897 (#145569)

PR #144897 added #include
"mlir/IR/Visitors.h" to mlir/include/mlir/Support/StateStack.h. This
change fixes the build file.

Author: itf

utils/bazel/llvm-project-overlay/mlir/BUILD.bazel

@@ -4845,7 +4845,10 @@ cc_library(
     ]),
     hdrs = glob(["include/mlir/Support/*.h"]),
     includes = ["include"],
-    deps = ["//llvm:Support"],
+    deps = [
+        "//llvm:Support"
+        "//mlir:IR",
+    ],
 )
 
 cc_library(