Allow time scale to offset using skipped ticks

[etimberg]

Resolves #10215 using a new option for time scales called offsetAfterAutoskip.

If there are better option names, we can use that too. Perhaps an offsetTicks setting with two options: 'all' and 'skipped'

[kurkle]

Could be also a new value for the existing offset option. offset: true // === 'all', offset: 'skipped'.
But I'm not really a fan of that :)

[kurkle]

Does it break many fixtures if this would be default? Just wondering if the option could be avoided.
In case the option is needed, the suggested one is fine by me.

[etimberg]

Setting this as the default breaks 2 fixtures

[etimberg]

One of those changes is pretty big

though

[kurkle]

That one does not have any ticks, so could maybe be worked around.. But anyway, I think its safer to have the new option.

[etimberg]

I agree, a new option makes more sense. We can change the default at v4