Move Vulkan includes to a central godot_vulkan.h header

Also fixes Vulkan build problem with recent Clang.

(cherry picked from commit 146ba4106f)

thirdparty/vulkan/patches/VKEnumStringHelper-use-godot-vulkan.patch

@@ -1,17 +1,16 @@
 diff --git a/thirdparty/vulkan/vk_enum_string_helper.h b/thirdparty/vulkan/vk_enum_string_helper.h
-index 65b3322c07..e8c61aaf15 100644
+index 062c3d9915..10df8e8115 100644
 --- a/thirdparty/vulkan/vk_enum_string_helper.h
 +++ b/thirdparty/vulkan/vk_enum_string_helper.h
-@@ -37,7 +37,11 @@
+@@ -28,8 +28,10 @@
+ #pragma warning( disable : 4065 )
  #endif
  
++#ifdef __cplusplus
  #include <string>
 -#include <vulkan/vulkan.h>
-+#ifdef USE_VOLK
-+    #include <volk.h>
-+#else
-+    #include <vulkan/vulkan.h>
 +#endif
++#include "drivers/vulkan/godot_vulkan.h"
  
  
  static inline const char* string_VkResult(VkResult input_value)

thirdparty/vulkan/patches/VMA-use-godot-vulkan.patch

@@ -1,17 +1,15 @@
 diff --git a/thirdparty/vulkan/vk_mem_alloc.h b/thirdparty/vulkan/vk_mem_alloc.h
-index 44affc5ca4..d96f2dacc0 100644
+index 1add7278b0..1e03339ecf 100644
 --- a/thirdparty/vulkan/vk_mem_alloc.h
 +++ b/thirdparty/vulkan/vk_mem_alloc.h
-@@ -127,7 +127,11 @@ extern "C" {
+@@ -126,9 +126,7 @@ See documentation chapter: \ref statistics.
+ extern "C" {
  #endif
  
- #ifndef VULKAN_H_
+-#ifndef VULKAN_H_
 -    #include <vulkan/vulkan.h>
-+    #ifdef USE_VOLK
-+        #include <volk.h>
-+    #else
-+        #include <vulkan/vulkan.h>
-+    #endif
- #endif
+-#endif
++#include "drivers/vulkan/godot_vulkan.h"
  
  // Define this macro to declare maximum supported Vulkan version in format AAABBBCCC,
+ // where AAA = major, BBB = minor, CCC = patch.

thirdparty/vulkan/vk_enum_string_helper.h

@@ -28,12 +28,10 @@
 #pragma warning( disable : 4065 )
 #endif
 
+#ifdef __cplusplus
 #include <string>
-#ifdef USE_VOLK
-    #include <volk.h>
-#else
-    #include <vulkan/vulkan.h>
 #endif
+#include "drivers/vulkan/godot_vulkan.h"
 
 
 static inline const char* string_VkResult(VkResult input_value)

thirdparty/vulkan/vk_mem_alloc.h

@@ -126,13 +126,7 @@ See documentation chapter: \ref statistics.
 extern "C" {
 #endif
 
-#ifndef VULKAN_H_
-    #ifdef USE_VOLK
-        #include <volk.h>
-    #else
-        #include <vulkan/vulkan.h>
-    #endif
-#endif
+#include "drivers/vulkan/godot_vulkan.h"
 
 // Define this macro to declare maximum supported Vulkan version in format AAABBBCCC,
 // where AAA = major, BBB = minor, CCC = patch.