Expose batch APIs for linestrips

[jleibs]

What

Although batch linestrips have been supported by our data-model, we didn't have an API for logging them as such.

This adds two new APIs:

• log_line_strips_2d and log_line_strips_3d

While being explicit about 2d vs 3d is not consistent with our existing python API surface, it drastically simplifies the error handling around type-inference in cases of empty lists, and iterables.

Given our future-looking APIs will also be explicit about APIs, this departure seems like a reasonable compromise.

Tested with:

rr.log_line_strips_3d(
    "simple",
    [
        [
            [0, 0, 2], [1, 0, 2], [1, 1, 2], [0, 1, 2],
        ],
        [
            [0, 0, 0], [0, 0, 1], [1, 0, 0], [1, 0, 1], [1, 1, 0], [1, 1, 1], [0, 1, 0], [0, 1, 1],
        ],
    ],
    identifiers=[17, 42],
    colors=[[255, 0, 0], [0, 255, 0]],
    stroke_widths=[0.05, 0.2],
)

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested demo.rerun.io (if applicable)

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[Wumpf]

what a great reminder on why we want codegen :D

I know we don't want to loose a lot of time on this one, but can we please add a simple usage of this to api_test?

Slack approval