Fixes to PREMIS event recording

[mcantelon]

• Removed redundant PREMIS event for validate file formats
• Correct use of improper PREMIS event types
• Allow PREMIS evebt details and PREMIS event outcome detail to be specified rather than generated
• Add PREMIS event outcome detail specification to PREMIS events in workflow and validate file formats activity
• Generate error when attempting to add a PREMIS event to a non-existent PREMIS object
• Fixed issue with validate formats activity
• Removed unneeded code in tests for add PREMIS event activity

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 86.11111% with 5 lines in your changes missing coverage. Please review.

Project coverage is 66.59%. Comparing base (84e8e73) to head (3d4b526).

Files	Patch %	Lines
internal/premis/premis.go	81.25%	2 Missing and 1 partial :warning:
internal/activities/validate_file_formats.go	75.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #31 +/- ## ========================================== - Coverage 66.77% 66.59% -0.18% ========================================== Files 19 19 Lines 936 940 +4 ========================================== + Hits 625 626 +1 - Misses 261 263 +2 - Partials 50 51 +1 ```

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[mcantelon]

Thanks @jraddaoui !