Adjust structure of all BUILD files to recommended style (https://docs.bazel.build/versions/master/skylark/build-style.html#file-structure), moving loads to top.

PiperOrigin-RevId: 252055555

tensorflow/core/grappler/BUILD

@@ -1,9 +1,9 @@
+load("//tensorflow:tensorflow.bzl", "tf_cc_test", "tf_cuda_library")
+
 package(
     licenses = ["notice"],  # Apache 2.0
 )
 
-load("//tensorflow:tensorflow.bzl", "tf_cc_test", "tf_cuda_library")
-
 cc_library(
     name = "op_types",
     srcs = ["op_types.cc"],

tensorflow/core/grappler/clusters/BUILD

@@ -1,7 +1,3 @@
-package(
-    licenses = ["notice"],  # Apache 2.0
-)
-
 load("@local_config_cuda//cuda:build_defs.bzl", "if_cuda")
 load("//tensorflow:tensorflow.bzl", "tf_cc_test")
 load("//tensorflow:tensorflow.bzl", "tf_cuda_library")
@@ -10,6 +6,10 @@ load(
     "tf_cuda_tests_tags",
 )
 
+package(
+    licenses = ["notice"],  # Apache 2.0
+)
+
 config_setting(
     name = "xsmm",
     licenses = ["notice"],

tensorflow/core/grappler/costs/BUILD

@@ -1,12 +1,21 @@
-package(
-    licenses = ["notice"],  # Apache 2.0
-)
-
 load("//tensorflow:tensorflow.bzl", "tf_cc_test", "tf_cuda_library")
 load(
     "//tensorflow/core:platform/default/build_config.bzl",
     "tf_protos_grappler",
 )
+load(
+    "//tensorflow/core:platform/default/build_config.bzl",
+    "tf_additional_all_protos",
+    "tf_proto_library",
+)
+load(
+    "@local_config_cuda//cuda:build_defs.bzl",
+    "if_cuda",
+)
+
+package(
+    licenses = ["notice"],  # Apache 2.0
+)
 
 filegroup(
     name = "graph_properties_testdata",
@@ -17,16 +26,6 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 
-load(
-    "//tensorflow/core:platform/default/build_config.bzl",
-    "tf_additional_all_protos",
-    "tf_proto_library",
-)
-load(
-    "@local_config_cuda//cuda:build_defs.bzl",
-    "if_cuda",
-)
-
 tf_proto_library(
     name = "op_performance_data",
     srcs = ["op_performance_data.proto"],

tensorflow/core/grappler/graph_analyzer/BUILD

@@ -1,9 +1,9 @@
+load("//tensorflow:tensorflow.bzl", "tf_cc_test")
+
 package(
     licenses = ["notice"],  # Apache 2.0
 )
 
-load("//tensorflow:tensorflow.bzl", "tf_cc_test")
-
 cc_library(
     name = "graph_analyzer_lib",
     srcs = [

tensorflow/core/grappler/inputs/BUILD

@@ -1,9 +1,9 @@
+load("//tensorflow:tensorflow.bzl", "tf_cc_test")
+
 package(
     licenses = ["notice"],  # Apache 2.0
 )
 
-load("//tensorflow:tensorflow.bzl", "tf_cc_test")
-
 cc_library(
     name = "utils",
     srcs = [

tensorflow/core/grappler/optimizers/BUILD

@@ -1,7 +1,3 @@
-package(
-    licenses = ["notice"],  # Apache 2.0
-)
-
 load("//tensorflow:tensorflow.bzl", "tf_cc_test", "tf_kernel_library")
 load("//tensorflow:tensorflow.bzl", "tf_cc_test_mkl")
 load("//tensorflow:tensorflow.bzl", "tf_cuda_cc_test")
@@ -12,6 +8,10 @@ load(
     "if_static",
 )
 
+package(
+    licenses = ["notice"],  # Apache 2.0
+)
+
 cc_library(
     name = "static_schedule",
     srcs = ["static_schedule.cc"],

tensorflow/core/grappler/optimizers/data/vectorization/BUILD

@@ -1,11 +1,11 @@
+load("//tensorflow:tensorflow.bzl", "tf_cc_test")
+load("//tensorflow/core:platform/default/build_config.bzl", "tf_protos_all")
+
 package(
     default_visibility = ["//visibility:private"],
     licenses = ["notice"],  # Apache 2.0
 )
 
-load("//tensorflow:tensorflow.bzl", "tf_cc_test")
-load("//tensorflow/core:platform/default/build_config.bzl", "tf_protos_all")
-
 VECTORIZER_DEPS = [
     ":vectorizer_registry",
     "//tensorflow/cc:ops",

tensorflow/core/grappler/utils/BUILD

@@ -1,13 +1,13 @@
-package(
-    licenses = ["notice"],  # Apache 2.0
-)
-
 load("//tensorflow:tensorflow.bzl", "tf_cc_test")
 load(
     "//tensorflow/core:platform/default/build_config.bzl",
     "tf_protos_grappler",
 )
 
+package(
+    licenses = ["notice"],  # Apache 2.0
+)
+
 cc_library(
     name = "scc",
     srcs = ["scc.cc"],

tensorflow/core/grappler/verifiers/BUILD

@@ -1,9 +1,9 @@
+load("//tensorflow:tensorflow.bzl", "tf_cc_test")
+
 package(
     licenses = ["notice"],  # Apache 2.0
 )
 
-load("//tensorflow:tensorflow.bzl", "tf_cc_test")
-
 cc_library(
     name = "graph_verifier",
     hdrs = [