Change return type of generated setters to the message type#281

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craigatron wants to merge 4 commits intoimprobable-eng:masterfrom craigatron:set-return-type

+1,704-1,475

Commits on Jun 21, 2021

Commits on Jun 25, 2021

Fix return type for clear methods and repeated primitive field adders.
craigatron
committed

Commits on Jul 12, 2021

Add tests for repeated message field add chaining.
craigatron
committed