headers: Fix dispatch table formatting

The code did not follow the provided clang-format file, which causes
conflict when a developer runs clang-format on the repo. This commit fixes
the generator so that the output is what clang-format would generate.
One issue is that clang-format's ColumnLimit will wrap long lines, and is
very difficult to replicate in python code without excessive changes. The
chosen solution is to use a custom clang-format file for the Utilities
folder which ignores the ColumnLimit.

include/vulkan/utility/.clang-format

@@ -0,0 +1,16 @@
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+---
+# Use defaults from the Google style with the following exceptions:
+BasedOnStyle: Google
+IndentWidth: 4
+AccessModifierOffset: -2
+# Modify Disable column limit in generated code
+ColumnLimit: 0
+SortIncludes: false
+...
+