HPCC-12642 Add link/Release implementations that are not thread safe

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
That's what the other classes are for.  This one is where a class isn't actually shared so you want to remove the overhead of the count, but don't want to have to change the rest of the code.  It may never be used, but I had some possibilities in the code generator.

See CSingleThreadXXX for the main examples.