Fix rhumb triangulation across IDL

[hpinkos]

Fixes #8042

This is the same fix @shehzan10 added in #8176, but attempts to account for when the polygon positions cross the IDL for the projection into 2D for triangulation. It makes the assumption that if adjacent polygon positions are greater than 180 degrees away, it must be because that position crossed the IDL and it adds TWO_PI to the longitude. I think this is a safe assumption because Cesium can't triangulate polygons that are larger than half the earth anyway. I honestly couldn't figure out a better way to do this, but I'm open to suggestions if anyone has one. I originally wanted to use Rectangle.fromCartesianArray to get the "west" edge but that doesn't handle the case where a polygon crosses both the IDL and the prime meridian.

TODO

• Fix polygons that cross poles

[cesium-concierge]

Thanks for the pull request @hpinkos!

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[hpinkos]

@shehzan10 please review

[hpinkos]

shoot, I made a mistake and forgot to account for polygons that go across the north or south pole. I'm going to revert those changes in master and put this on hold until we figure out a solution that works in all those edge cases.