HPCC-8745 Implement inline dictionaries as compile time constants

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #3996 from ghalliday/issue8745

HPCC-8745 Implement inline dictionaries as compile time constants

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>