Update for WCS20 extensions: mapservermapserver#4898

- Updated test results for fixed profiles and missing interpolation and CRS values.
- Adding results for subsettingCRS and outputCRS testing params.
- Fixing expected results for WCS 2.0 getcapabilities after mapfile changes.
- Added expected results for GetCoverage requests with geotiff parameters.
- Adding expected results for rangesubset tests.
- Adding additional test cases.
- Adding additional expected results for POST requests using the WCS 2.0 CRS Extension.
- Adding additional testcases for CRS Extension.
- Adding tests and expected results for KVP scaling extension
- Adding additional test cases for POST for the WCS scaling extension.
- Adding POST/XML tests for Interpolation extension. Adapted one exception message.
- Fixing test which used a decimal predictor value, to use an enum string.
- Updating expected results to what the tests actually resemble. Checked with GDAL checksum.
- Fixing expected results for WCS 2.0 GetCap test cases.