fix: Disable broken upgrade plugins

[seakayone]

When using more than the built-in graphs the RepositoryUpdater fails to append data in the downloaded files.
Until this is resolved we need to disable the plugins and remain on knora-base version 28.

Pull Request Checklist

Task Description/Number

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.75%. Comparing base (eac5751) to head (1862fff).
Report is 128 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3117       +/-   ##
===========================================
+ Coverage   11.74%   88.75%   +77.01%     
===========================================
  Files         246      263       +17     
  Lines       22907    22402      -505     
===========================================
+ Hits         2690    19883    +17193     
+ Misses      20217     2519    -17698     

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