Update finalize to meet standard

[shuds13]

• Remove finalize return and argument
• Add get/export_data function.
• Ensure finalize finishes any comms with remote process (and shuts down) so export simply returns data.
• Add user_fields option to export to return H with user fields (e.g., beam_length)
• Add tests for new unmapping function + finalize/export.
• Rename generator_standard to gest_api

[jlnav]

Good catch. Thankfully I believe I adjusted the runner recently to not suggest/ingest data from finalize anymore,

        tag, Work, H_in = self.ps.send_recv(H_out)  # evaluate the initial sample
        final_H_out = self._start_generator_loop(tag, Work, H_in)
        self.gen.finalize()

but the signature obviously was still incorrect

[codecov]

Codecov Report

❌ Patch coverage is 77.02703% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.79%. Comparing base (6b54991) to head (ad54abd).
⚠️ Report is 193 commits behind head on experimental/jlnav_plus_shuds_asktell.

Files with missing lines	Patch %	Lines
libensemble/generators.py	72.22%	10 Missing ⚠️
libensemble/gen_classes/aposmm.py	76.92%	1 Missing and 2 partials ⚠️
libensemble/gen_funcs/aposmm_localopt_support.py	33.33%	2 Missing ⚠️
libensemble/utils/misc.py	90.47%	1 Missing and 1 partial ⚠️

❗ There is a different number of reports uploaded between BASE (6b54991) and HEAD (ad54abd). Click for more details.

HEAD has 5 uploads less than BASE

Flag	BASE (6b54991)	HEAD (ad54abd)
	15	10

Additional details and impacted files

@@                            Coverage Diff                             @@
##           experimental/jlnav_plus_shuds_asktell    #1582       +/-   ##
==========================================================================
- Coverage                                  89.95%   78.79%   -11.17%     
==========================================================================
  Files                                         79       79               
  Lines                                       7915     7964       +49     
  Branches                                    1176     1192       +16     
==========================================================================
- Hits                                        7120     6275      -845     
- Misses                                       615     1472      +857     
- Partials                                     180      217       +37     

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