Remove CCE ability to read metric worldtube data

[knelli2]

Proposed changes

The CCE executable now only accepts worldtube data in the Bondi-modal format. Other formats should be converted into the Bondi-modal format with the PreprocessCceWorldtube executable.

Upgrade instructions

The CCE and KleinGordon CCE executables can no longer read worldtube data written in the "metric" form (i.e. spatial metric, lapse, shift, and their time and radial derivatives). They can only now read worldtube data written in the bondi form, made up of modal coefficients. The preferred method for converting worldtube data is to use the PreprocessCceWorldtube executable.

The input file options H5IsBondiData and FixSpecNormalization are removed from the CCE and KleinGordon CCE input files.

Code review checklist

• The code is documented and the documentation renders correctly. Run
  make doc to generate the documentation locally into BUILD_DIR/docs/html.
  Then open index.html.
• The code follows the stylistic and code quality guidelines listed in the
  code review guide.
• The PR lists upgrade instructions and is labeled bugfix or
  new feature if appropriate.

Further comments