Allow worker to configure client and server strategies separately

[mhenrixon]

Is your feature request related to a problem? Please describe.
One current bug is in regards to until_and_while_executing. The client and server lock can't use all the same strategies and people run into stackoverflow exceptions.

Describe the solution you'd like
Introduce a new API with a fallback to the old one and use the worker options validation to give the user feedback about incompatible strategies.

sidekiq_options lock: :until_and_while_executing, on_conflict: { client: :log, server: :raise } 

OR

unique_lock :until_and_while_executing, on_conflict: { client: :log, server: :raise }