[SYCL][7.0.0] Disable PRE_RELEASE (#22613)

Setting PRE_RELEASE to 0 as this is now a stable release. Customers who
build the compiler from source should not see any "pre-release" messages
in the version strings by default.

Signed-off-by: Dmitry Vodopyanov <dmitry.vodopyanov@intel.com>

Author: dm-vodopyanov

.github/workflows/sycl-rel-nightly.yml

@@ -9,7 +9,7 @@ on:
       pre_release:
         description: PRE_RELEASE CMake variable value (e.g. 0 or 1)
         required: false
-        default: '1'
+        default: '0'
 
 
 permissions: read-all

cmake/Modules/DPCPPVersion.cmake

@@ -10,5 +10,5 @@ if(NOT DEFINED DPCPP_VERSION_PATCH)
   set(DPCPP_VERSION_PATCH 0)
 endif()
 if(NOT DEFINED PRE_RELEASE)
-  set(PRE_RELEASE 1)
+  set(PRE_RELEASE 0)
 endif()