Set sidekiq_options retry to 3 for the GenericWorker

[vasconsaurus]

Description

Pretty straight forward. Sets the maximum retry count to 3.

Note

We want to add custom retry logic, but that works differently between Sidekiq 5 and 6.
So we think it is better to focus later on the Sidekiq upgrade, and until there, worker instances can handle their exceptions instead of relying on the generic worker for that.

References: 5120, #2005

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