cleanup: Removed unnecessary apply of jacoco plugin.

[ouphi]

What this PR changes/adds

Removed unnecessary apply of jacoco plugin.

Why it does that

jacoco plugin is applied twice in the build.gradle.kts.

Linked Issue(s)

No issue, just a cleanup.

Checklist

• [x] added appropriate tests?
• [x] performed checkstyle check locally?
• [x] added/updated copyright headers?
• [x] documented public classes/methods?
• [x] added/updated relevant documentation?
• [x] added relevant details to the changelog? (skip with label no-changelog)
• [x] formatted title correctly?

[github-actions[bot]]

Unit Test Results

18 tests  ±0   17 :heavy_check_mark: ±0   38s :stopwatch: ±0s   6 suites ±0     1 :zzz: ±0    6 files   ±0     0 :x: ±0 

Results for commit 46c4e5f3. ± Comparison against base commit 6af8b571.

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (cleanup/upstream/remove-unecessary-apply@6af8b57). Click here to learn what that means. The diff coverage is n/a.

@@                             Coverage Diff                             @@
##             cleanup/upstream/remove-unecessary-apply     #257   +/-   ##
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  Coverage                                            ?   69.04%           
  Complexity                                          ?       13           
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  Files                                               ?        4           
  Lines                                               ?       42           
  Branches                                            ?        4           
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  Hits                                                ?       29           
  Misses                                              ?       13           
  Partials                                            ?        0           

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