Add OVERRIDE_DKSDK_VERSION option

cmake/scripts/dksdk/project/get.cmake

@@ -97,6 +97,10 @@ ONLY_DKSDK_VERSION
   Only fetch enough dependencies to calculate the DkSDK version accurately.
   Currently the dksdk-cmake dependency is the only dependency needed.
 
+OVERRIDE_DKSDK_VERSION <version
+  Specify the DkSDK version rather than interrogating the dksdk-cmake
+  dependency. The <version> must be in the Major.Minor.Patch format.
+
 NONINTERACTIVE
   Best effort attempt to stop `git` and any other source fetching tools from
   asking interactive questions like username/password prompts. Use when
@@ -109,7 +113,7 @@ endfunction()
 
 function(dksdk_project_get)
     set(noValues NONINTERACTIVE SANDBOX ONLY_DKSDK_VERSION)
-    set(singleValues LOG_LEVEL FETCH_DIR CONFIG_FILE SOURCE_DIR DKSDK_CMAKE_GITREF)
+    set(singleValues LOG_LEVEL FETCH_DIR CONFIG_FILE SOURCE_DIR DKSDK_CMAKE_GITREF OVERRIDE_DKSDK_VERSION)
     set(multiValues)
     cmake_parse_arguments(PARSE_ARGV 0 ARG "${noValues}" "${singleValues}" "${multiValues}")
 
@@ -134,6 +138,9 @@ function(dksdk_project_get)
     if(ARG_ONLY_DKSDK_VERSION)
         list(APPEND get_OPTS -D ONLY_DKSDK_VERSION=1)
     endif()
+    if(ARG_OVERRIDE_DKSDK_VERSION)
+        list(APPEND get_OPTS -D "OVERRIDE_DKSDK_VERSION=${OVERRIDE_DKSDK_VERSION}")
+    endif()
     if(ARG_DKSDK_CMAKE_GITREF)
         list(APPEND get_OPTS -D "DKSDK_CMAKE_GITREF=${DKSDK_CMAKE_GITREF}")
     endif()