Fix baserule import in tests

[hmSchuller]

#4157 changed the location of BaseRule, but missed an import in a test package.

This PR fixes it.

[cortinico]

I'm actually surprised that this happened 🤔 Was the task failing locally?

[hmSchuller]

Yes it was. That's why I ran the task apiDump. Should that change be excluded from this PR?

[cortinico]

Nope that's fine 👍 I'm more wondering how comes that this change was not captured by the CI at #4157 I'll look into it.

[cortinico]

Oh seems like we effectively broke the CI. This PR fixes it 🚀 Thanks for doing it!

[codecov]

Codecov Report

Merging #4189 (1e7bba7) into main (75bec4a) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #4189   +/-   ##
=========================================
  Coverage     84.13%   84.13%           
  Complexity     3201     3201           
=========================================
  Files           467      467           
  Lines         10108    10108           
  Branches       1773     1773           
=========================================
  Hits           8504     8504           
  Misses          673      673           
  Partials        931      931           

Impacted Files	Coverage Δ
...kotlin/io/gitlab/arturbosch/detekt/api/BaseRule.kt	100.00% <ø> (ø)
...otlin/io/gitlab/arturbosch/detekt/api/MultiRule.kt	100.00% <ø> (ø)
...ain/kotlin/io/gitlab/arturbosch/detekt/api/Rule.kt	62.96% <ø> (ø)
.../kotlin/io/gitlab/arturbosch/detekt/api/RuleSet.kt	75.00% <ø> (ø)
...otlin/io/gitlab/arturbosch/detekt/core/Analyzer.kt	81.81% <ø> (ø)
...io/gitlab/arturbosch/detekt/core/rules/RuleSets.kt	100.00% <ø> (ø)
...arturbosch/detekt/core/rules/SingleRuleProvider.kt	100.00% <ø> (ø)
.../arturbosch/detekt/core/suppressors/Suppressors.kt	100.00% <ø> (ø)

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