Botond Dénes 1750bb34b7 Merge 'sstables, replica: add generation generator' from Kefu Chai ...

this is the first step to the uuid-based generation identifier. the goal is to encapsulate the generation related logic in generator, so its consumers do not have to understand the difference between the int64_t based generation and UUID v1 based generation.

this commit should not change the behavior of existing scylla. it just allows us to derive from `generation_generator` so we can have another generator which generates UUID based generation identifier.

Closes #13073

* github.com:scylladb/scylladb:
  replica, test: create generation id using generator
  sstables: add generation_generator
  test: sstables: use generate_n for generating ids for testing

2023-04-24 09:31:08 +03:00

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