HydroDyn/SeaState Code Cleanup + Registry updates

[bjonkman]

Feature or improvement description

• Removed unused subroutines, variables, and sections of HydroDyn code that were logically impossible to get to (including a lot of Morison submodule file output options)
• Made sure the SeaState output files are named consistently (previously some were RootName.SEA.ext and some RootName.SeaSt.ext).
• Fixed some error handling in HydroDyn and SeaState
• Updates to VersionInfo (see Updates to VersionInfo module and its dependencies OpenFAST/openfast#1124).
• Updated FAST Registry to add an optional argument to the destroy routines, telling it to nullify pointers but not deallocate the memory they point to. This allows us to get rid of the nullify() statements strewn throughout the code, which have a tendency to be set incorrectly (or be missed). PLEASE LET ME KNOW IF YOU NOTICE ISSUES WITH THIS PART OF THE CODE.
  • updated Types.f90 files generated by the Registry
• Updated pointer to r-test with updated input files for HydroDyn. This also involved updating example input files in the docs folder.

Impacted areas of the software
HydroDyn, SeaState, NWTC_Library, VersionInfo, Registry (+ all registry-generated *_Types files)

Test results, if applicable
The r-tests run locally, but--as expected--give different answers from previous versions.

Just as a note, there seem to be some intermittent issues with file I/O in the HydroDyn driver (with gfortran). I think this is similar to the intermittent behavior that the AeroDyn driver also exhibits sometimes. For example, in https://github.com/bjonkman/openfast/actions/runs/2303615322, the HD driver's ITI barge regression case runs to completion in debug mode, but in release mode it fails with this error:

 Error status and messages after execution:
            ErrStat: 4
    ErrMsg returned: SeaSt_Init:SeaStateInput_ProcessInitData:NWaveElev must not be negative.

The echo files for debug/release are the same, showing that NWaveElev is read as 1:

---------------------- OUTPUT --------------------------------------------------
 True            = SeaStSum            
 3               = OutSwtch            
 E15.7e2         = OutFmt              
 A11             = OutSFmt             
 1               = NWaveElev           
0   WaveElevxi     - List of xi-coordinates for points where the incident wave elevations can be output (meters) [NWaveElev points, separated by commas or white space; usused if NWaveElev = 0]
0   WaveElevyi     - List of yi-coordinates for points where the incident wave elevations can be output (meters) [NWaveElev points, separated by commas or white space; usused if NWaveElev = 0]
 0               = NWaveKin            
14.43376,      -18.4752    WaveKinxi - List of xi-coordinates for points where the wave kinematics can be output (meters) [NWaveKin points, separated by commas or white space; usused if NWaveKin = 0]
25,            -6    WaveKinyi - List of yi-coordinates for points where the wave kinematics can be output (meters) [NWaveKin points, separated by commas or white space; usused if NWaveKin = 0]
-14,           -17    WaveKinzi - List of zi-coordinates for points where the wave kinematics can be output (meters) [NWaveKin points, separated by commas or white space; usused if NWaveKin = 0]