Simplify user interface for KernelFunctionOperation

[glwagner]

This PR gets rid of the kwargs computed_dependencies and parameters. Instead we just have "arguments", which are varargs to the constructor:

    using Oceananigans.Operators: ζ₃ᶠᶠᶜ # called with signature ζ₃ᶠᶠᶜ(i, j, k, grid, u, v)

    grid = model.grid
    u, v, w = model.velocities

    ζ_op = KernelFunctionOperation{Face, Face, Center}(ζ₃ᶠᶠᶜ, grid, u, v)

compute! on KernelFunctionOperation calls compute! on all of the kernel arguments.

I think this is a simpler and more intuitive interface leading to more understandable code.

[navidcy]

Looks good to me. It's breaking change so bump up minor release..

[simone-silvestri]

sounds good

[tomchor]

Looks good to me. It's breaking change so bump up minor release..

At the moment we have 3 PRs that are breaking releases: this one, #2963, and #2842.

If it looks like all of them are going to be merged, can we coordinate and tag/register v0.80.0 only after all these are merged?

[glwagner]

Good idea

[glwagner]

Is #2842 close?

[tomchor]

Is #2842 close?

I think so. I have a couple of @navidcy's comments left to address (which shouldn't be hard) and I'd appreciate another review from you before merging.

I could have it ready by tomorrow assuming no major points of disagreement or major changes emerge during the review process.

[navidcy]

some tests didn't make it through

[navidcy]

something seems to have broken for GPU?

[navidcy]

No need to bump release since we didn’t register v0.80.0 yet