Use rules_cc to load cc symbols (#4579)

**What type of PR is this?**
Refactor/cleanup

**What does this PR do? Why is it needed?**
These should disappear from @bazel_tools eventually

**Which issues(s) does this PR fix?**

Fixes #

**Other notes for review**

go/private/BUILD.bazel

diff --git a/go/private/BUILD.bazel b/go/private/BUILD.bazel
index e18aa94..ed66414 100644
--- a/go/private/BUILD.bazel
+++ b/go/private/BUILD.bazel
@@ -64,10 +64,9 @@
         "//go/private/rules:transition",
         "@bazel_skylib//lib:paths",
         "@bazel_skylib//rules:common_settings",
-        "@bazel_tools//tools/build_defs/cc:action_names.bzl",
-        "@bazel_tools//tools/cpp:toolchain_utils.bzl",
         "@io_bazel_rules_nogo//:scope.bzl",
-        "@rules_cc//cc:find_cc_toolchain_bzl",  # Transitive dep of @bazel_tools//tools/cpp:toolchain_utils.bzl
+        "@rules_cc//cc:action_names_bzl",
+        "@rules_cc//cc:find_cc_toolchain_bzl",
     ],
 )
 

go/private/context.bzl

diff --git a/go/private/context.bzl b/go/private/context.bzl
index 1b8d6d0..d669983 100644
--- a/go/private/context.bzl
+++ b/go/private/context.bzl
@@ -21,7 +21,7 @@
     "BuildSettingInfo",
 )
 load(
-    "@bazel_tools//tools/build_defs/cc:action_names.bzl",
+    "@rules_cc//cc:action_names.bzl",
     "CPP_COMPILE_ACTION_NAME",
     "CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME",
     "CPP_LINK_EXECUTABLE_ACTION_NAME",
@@ -31,8 +31,8 @@
     "OBJC_COMPILE_ACTION_NAME",
 )
 load(
-    "@bazel_tools//tools/cpp:toolchain_utils.bzl",
-    "find_cpp_toolchain",
+    "@rules_cc//cc:find_cc_toolchain.bzl",
+    "find_cc_toolchain",
 )
 load(
     "@io_bazel_rules_nogo//:scope.bzl",
@@ -79,7 +79,7 @@
 
 CPP_TOOLCHAIN_TYPE = Label("@bazel_tools//tools/cpp:toolchain_type")
 CGO_ATTRS = {
-    "_cc_toolchain": attr.label(default = "@bazel_tools//tools/cpp:optional_current_cc_toolchain"),
+    "_cc_toolchain": attr.label(default = "@rules_cc//cc:optional_current_cc_toolchain"),
     "_xcode_config": attr.label(default = configuration_field(fragment = "apple", name = "xcode_config_label")),
     "_pure_flag": attr.label(default = "//go/config:pure"),
     "_pure_constraint": attr.label(default = "//go/toolchain:cgo_off"),
@@ -794,7 +794,7 @@
     # toolchain (to be inputs into actions that need it).
     # ctx.files._cc_toolchain won't work when cc toolchain resolution
     # is switched on.
-    cc_toolchain = find_cpp_toolchain(ctx, mandatory = False)
+    cc_toolchain = find_cc_toolchain(ctx, mandatory = False)
     if not cc_toolchain or cc_toolchain.compiler in _UNSUPPORTED_C_COMPILERS:
         return None