Normalize the scheduler db for better `swh db` compatibility

In the next version of swh.core, we expect all the swh.core.db based swh backends to register themselves in the swh.<package>.classes entry point so the swh db tools can easily handle the whole lifecycle of the backend's db easily (especially in integration tests like the docker env or the mirror deployment project).

So be it.

Will need a dependency bump on swh.core before merging.

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• 5764a7aa - Declare scheduler backends in the swh.scheduler.classes entry point

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resolved all threads

If "local" is not present there, can we still use it (as per some code you kept here)?

(Note that it's been a while since it has been deprecated so might be, we could drop it altogether now. We no longer use "local" in our charts)

@douardda ^

If "local" is not present there, can we still use it (as per some code you kept here)?

not really indeed.

I'd like to remove it completely, since it's been deprecated for quite a while now.

Fine with me.

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• 5764a7aa...da126619 - 11 commits from branch swh/devel:master
• 772bfe56 - Declare scheduler backends in the swh.scheduler.classes entry point

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• a08abb96 - Declare scheduler backends in the swh.scheduler.classes entry point

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• 8f341cfe - Replace remaining 'local' cls with 'postgresql'

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merged