Remove color-interpolation partial implementation flag

[captainbrosset]

Summary

This PR removes the partial implementation flags for the color-interpolation CSS property, for both Chrome and Safari.

The reason for this is:

1. The property is supported on those browsers.
2. Not all values are supported though, but the supported/unsupported values are already tracked in the same BCD file as sub-features. So there's no need to show the parent feature as partially supported when that information is already tracked elsewhere.

Test results and supporting details

Related issues

Fixes #26198.