Don't duplicate constants

[BraisGabin]

We had DETEKT_OUTPUT_REPORT_BASE_PATH_KEY on :detekt-api and detekt-core. core can use the value in api to avoid disalignments.

#7241 will obsolete this PR but meanwhile it will help to find the usages too.

[detekt-ci]

	Warnings
⚠️	It looks like this PR contains functional changes without a corresponding test.
⚠️	This PR is approved with no milestone set. If merged, it won't appear in the detekt release notes.

Generated by 🚫 dangerJS against ef767dc

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.70%. Comparing base (0cab28d) to head (ef767dc).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #7242   +/-   ##
=========================================
  Coverage     84.70%   84.70%           
  Complexity     3992     3992           
=========================================
  Files           578      578           
  Lines         12164    12164           
  Branches       2495     2495           
=========================================
  Hits          10303    10303           
  Misses          627      627           
  Partials       1234     1234           

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