Refactor version macros and fix related bugs

The previous logic with VERSION_MKSTRING was a bit unwieldy, so there were
several places hardcoding their own variant of the version string, potentially
with bugs (e.g. forgetting the patch number when defined).

The new logic defines:

- VERSION_BRANCH, the main 'major.minor' version (e.g. 3.1)
- VERSION_NUMBER, which can be 'major.minor' or 'major.minor.patch',
  depending on whether the latter is defined (e.g. 3.1.4)
- VERSION_FULL_CONFIG, which contains the version status (e.g. stable)
  and the module-specific suffix (e.g. mono)
- VERSION_FULL_BUILD, same as above but with build/reference name
  (e.g. official, custom_build, mageia, etc.)
  Note: Slight change here, as the previous format had the build name
  *before* the module-specific suffix; now it's after
- VERSION_FULL_NAME, same as before, so VERSION_FULL_BUILD prefixed
  with "Godot v" for readability

Bugs fixed thanks to that:

- Export templates version matching now properly takes VERSION_PATCH
  into account by relying on VERSION_FULL_CONFIG.
- ClassDB hash no longer takes the build name into account, but limits
  itself to VERSION_FULL_CONFIG (build name is cosmetic, not relevant
  for the API hash).
- Docs XML no longer hardcode the VERSION_STATUS, this was annoying.
- Small cleanup in Windows .rc file thanks to new macros.

platform/windows/godot_res.rc

@@ -3,11 +3,9 @@
 #define _STR(m_x) #m_x
 #define _MKSTR(m_x) _STR(m_x)
 #endif
+
 #ifndef VERSION_PATCH
 #define VERSION_PATCH 0
-#define PATCH_STRING
-#else
-#define PATCH_STRING "." _MKSTR(VERSION_PATCH)
 #endif
 
 GODOT_ICON ICON platform/windows/godot.ico
@@ -24,12 +22,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName",            "Godot Engine"
             VALUE "FileDescription",        VERSION_NAME " Editor"
-            VALUE "FileVersion",            _MKSTR(VERSION_MAJOR) "." _MKSTR(VERSION_MINOR) "." _MKSTR(VERSION_PATCH)
+            VALUE "FileVersion",            VERSION_NUMBER
             VALUE "ProductName",            VERSION_NAME
             VALUE "Licence",                "MIT"
-            VALUE "LegalCopyright",         "Copyright (c) 2007-" _MKSTR(VERSION_YEAR) " Juan Linietsky, Ariel Manzur"
+            VALUE "LegalCopyright",         "Copyright (c) 2007-" _MKSTR(VERSION_YEAR) " Juan Linietsky, Ariel Manzur and contributors"
             VALUE "Info",                   "https://godotengine.org"
-            VALUE "ProductVersion",         _MKSTR(VERSION_MAJOR) "." _MKSTR(VERSION_MINOR) PATCH_STRING "." VERSION_BUILD
+            VALUE "ProductVersion",         VERSION_FULL_BUILD
         END
     END
     BLOCK "VarFileInfo"