Add support for math expressions for offset-rotate interpolation

[chromium-wpt-export-bot]

This CL:

1. Adds support for offset-rotate property usage with math expressions and interpolation of this property;
2. Creates ComputeDegrees API for CSSPrimitiveValue with CSSLengthResolver;
3. Adds type info to the InterpolationNumber to make arithmetic operations for number and expression.

Note: the UnresolvedStyleOffsetRotation is needed to interpolate in expressions, before they are resolved to a single number. Bug: 1521261 Change-Id: I5e08bc69d0d33e7f9a4675e3a7bcc2fe7971ebd5 Reviewed-on: https://chromium-review.googlesource.com/5237680 WPT-Export-Revision: d6906bbb35b4ef919a4d62f726795de3b92de8d7

[dholbert]

Looks like this is a duplicate of #44509 - @danielsakhapov , should this one be closed?

[danielsakhapov]

You are right, thanks