HPCC-8785 - Distinguish between local execute and local data acts

KeyedJoin within a child query executures locally (no reliance on
master), but accesses data globally (the whole key) unless the
keyedjoin is marked LOCAL. Add a means to distinguis between
local execute and local data access activities.

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>
Merge pull request #3956 from jakesmith/keyedjoin-local-error

HPCC-8785 - Distinguish between local execute and local data acts

Reviewed-By: Gavin Halliday <gavin.halliday@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>