refactor: some more versioned clients

[dbolduc]

Part of the work for #10170

• privateca
• profiler
• recommender
• redis
• resourcesettings

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This change is 

[codecov]

Codecov Report

Base: 93.64% // Head: 93.64% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (397a401) compared to base (8c5eb6a).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10931   +/-   ##
=======================================
  Coverage   93.64%   93.64%           
=======================================
  Files        1717     1717           
  Lines      154933   154933           
=======================================
+ Hits       145090   145092    +2     
+ Misses       9843     9841    -2     

Impacted Files	Coverage Δ
google/cloud/internal/async_connection_ready.cc	89.36% <0.00%> (-4.26%)	⬇️
...le/cloud/storage/internal/curl_download_request.cc	88.62% <0.00%> (-0.34%)	⬇️
google/cloud/pubsub/samples/samples.cc	87.01% <0.00%> (+0.07%)	⬆️
...cloud/pubsub/internal/subscription_session_test.cc	97.99% <0.00%> (+0.16%)	⬆️
...le/cloud/internal/default_completion_queue_impl.cc	97.15% <0.00%> (+0.56%)	⬆️
...bigtable/examples/bigtable_hello_instance_admin.cc	83.00% <0.00%> (+2.00%)	⬆️

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