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8f7a6fd5eb
use utils::chunked_vector instead of std::vector to store cdc stream
sets for tablets.
a cdc stream set usually represents all streams for a specific table and
timestamp, and has a stream id per each tablet of the table. each stream
id is represented by 16 bytes. thus the vector could require quite large
contiguous allocations for a table that has many tablets. change it to
chunked_vector to avoid large contiguous allocations.
Fixes scylladb/scylladb#26791
Closes scylladb/scylladb#26792
(cherry picked from commit e7dbccd59e)
Closes scylladb/scylladb#26828