myrialang: add MyriaApply, and rules to remove stores and renames
myrialang: add MyriaApply, and rules to remove stores and renames

Currently, Datalog rule-chaining introduces a store followed by a rename in the
concatenation of plans.

In Myria, we can (for now) skip these, because we claim the Datalog user
"intends" to only store the predicates that aren't chained into other
predicates.

Signed-off-by: Daniel Halperin <1a02732a15f637c31107256cbee5819e36aa7c67@cs.washington.edu>

uwescience/raco,uwescience/raco,uwescience/raco,uwescience/raco,uwescience/raco