fix: save datasets when republished with no changes

[NilsOveTen]

part of Informasjonsforvaltning/fdk-issue-tracker#932

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.91%. Comparing base (bcdca4a) to head (79fffb8).

Files	Patch %	Lines
...dk_dataset_harvester/harvester/DatasetHarvester.kt	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #209      +/-   ##
============================================
+ Coverage     76.76%   76.91%   +0.14%     
- Complexity      122      126       +4     
============================================
  Files            24       24              
  Lines           667      667              
  Branches        102      102              
============================================
+ Hits            512      513       +1     
+ Misses           86       85       -1     
  Partials         69       69              

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