"
This change set is comprised of several unrelated patches regarding
some cleanups in cql3 layer code.
Most of the changes are aimed at eliminating superfluous `shared_ptr`
usages. In places where it can be safely assumed that objects passed
to the function are considered non-null and constant, these places
were adjusted to use passing as const ref instead.
Other changes incude eliminating unused arguments at some functions
and replacing usages of `shared_ptr<service::pager::paging_state>`
to use `lw_shared_ptr` instead, since `pager::paging_state` is final.
Tests: unit(dev, debug)
"
* 'feature/cql_cleanups_4' of https://github.com/ManManson/scylla:
cql3: minor sweeps through the cql layer code to reduce shared_ptrs count
cql3: change some function signatures to accept const references
cql3: change signatures of several functions to return crefs instead of pointers
cql3: remove unused argument at functions::castas_functions::get
paging_state: switch from shared_ptr to lw_shared_ptr
06c16108df