chore: Make it easier to switch Singer reader and writer IO implementations in plugin classes

[edgarrmondragon]

---

📚 Documentation preview 📚: https://meltano-sdk--2565.org.readthedocs.build/en/2565/

[codspeed-hq]

CodSpeed Performance Report

Merging #2565 will not alter performance

_{Comparing edgarrmondragon/refactor/easy-switch-singer-reader-writer (53dd5d7) with main (078cffd)}

Summary

✅ 6 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.47%. Comparing base (078cffd) to head (53dd5d7).
Report is 132 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2565   +/-   ##
=======================================
  Coverage   89.47%   89.47%           
=======================================
  Files          58       58           
  Lines        4796     4799    +3     
  Branches      937      937           
=======================================
+ Hits         4291     4294    +3     
  Misses        352      352           
  Partials      153      153           

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