feat(taps): Added a default user agent for REST and GraphQL taps

[edgarrmondragon]

So we encourage taps to be good WWW citizens :)

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📚 Documentation preview 📚: https://meltano-sdk--2549.org.readthedocs.build/en/2549/

[codspeed-hq]

CodSpeed Performance Report

Merging #2549 will not alter performance

_{Comparing edgarrmondragon/feat/default-user-agent (f9a074c) with main (477a5eb)}

Summary

✅ 6 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.51%. Comparing base (87d78b3) to head (dc7dcc7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2549      +/-   ##
==========================================
+ Coverage   89.47%   89.51%   +0.04%     
==========================================
  Files          58       58              
  Lines        4798     4799       +1     
  Branches      936      936              
==========================================
+ Hits         4293     4296       +3     
+ Misses        352      351       -1     
+ Partials      153      152       -1     

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