GeoServer does not understand WCS 2.0 GeoTiff extension prefixes in KVP requests
Description
When the geotiff extension to WCS 2.0 GetCoverage was implemented the various parameters were unprefixed, e.g.. "tileWidth", but the latest version of the extension asks them to be prefixed by "geotiff:", eg.. "geotiff:tileWidth".
Have the code interpret both versions (one because we have had it for long enough that some clients might be using it, and the other because it's the official spec now)
When the geotiff extension to WCS 2.0 GetCoverage was implemented the various parameters were unprefixed, e.g.. "tileWidth", but the latest version of the extension asks them to be prefixed by "geotiff:", eg.. "geotiff:tileWidth".
Have the code interpret both versions (one because we have had it for long enough that some clients might be using it, and the other because it's the official spec now)