fix: Use mapped stream aliases when handling ACTIVATE_VERSION messages in the base target class

[edgarrmondragon]

Closes #1055

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📚 Documentation preview 📚: https://meltano-sdk--2554.org.readthedocs.build/en/2554/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.44%. Comparing base (119a5ec) to head (5db0c23).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2554   +/-   ##
=======================================
  Coverage   89.44%   89.44%           
=======================================
  Files          58       58           
  Lines        4783     4784    +1     
  Branches      933      934    +1     
=======================================
+ Hits         4278     4279    +1     
  Misses        352      352           
  Partials      153      153           

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[codspeed-hq]

CodSpeed Performance Report

Merging #2554 will not alter performance

_{Comparing edgarrmondragon/fix/target-handle-activate-version (5db0c23) with main (9901d85)}

Summary

✅ 6 untouched benchmarks