Fix T56618: crash in release builds when GHOST asserts.

WITH_ASSERT_ABORT was not disabled for release builds. In most cases asserts
are disabled in release builds, but not always.

This also changes the buildbot to use blender_release.cmake instead of
blender_full.cmake, the only effective difference should be WITH_ASSERT_ABORT.

build_files/buildbot/config/blender_linux.cmake

@@ -1,6 +1,6 @@
 # ######## Global feature set settings ########
 
-include("${CMAKE_CURRENT_LIST_DIR}/../../cmake/config/blender_full.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/../../cmake/config/blender_release.cmake")
 
 # Detect which libc we'll be linking against.
 # Some of the paths will depend on this