ET#67376 [Connctor/C++] Fix the build-date in the INFO_BIN in Fedora packages

The rpm build for fedora platform sets the changelog date for SOURCE_DATE_EPOCH env variable.
Unsetting the SOURCE_DATE_EPOCH env variable to use the current system date

Author: gipulla

buildinfo.cmake

@@ -36,6 +36,7 @@ FUNCTION(GENERATE_INFO_BIN)
   ENDIF()
 
   MESSAGE("Generating INFO_BIN")
+  UNSET(ENV{SOURCE_DATE_EPOCH})
   string(TIMESTAMP INFO_DATE "%Y-%m-%d")
 
   IF (CMAKE_BUILD_TYPE)