refactor(artifactregistry): versioned clients

[dbolduc]

Part of the work for #10170

---

This change is 

[codecov]

Codecov Report

Base: 93.65% // Head: 93.66% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (1a9d219) compared to base (6523f91).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10869   +/-   ##
=======================================
  Coverage   93.65%   93.66%           
=======================================
  Files        1715     1715           
  Lines      154442   154442           
=======================================
+ Hits       144650   144653    +3     
+ Misses       9792     9789    -3     

Impacted Files	Coverage Δ
google/cloud/internal/async_connection_ready.cc	89.36% <0.00%> (-4.26%)	⬇️
...e/cloud/pubsublite/internal/alarm_registry_impl.cc	97.05% <0.00%> (-2.95%)	⬇️
google/cloud/internal/timer_queue.cc	96.10% <0.00%> (-1.30%)	⬇️
google/cloud/pubsub/subscriber_connection_test.cc	98.78% <0.00%> (-1.22%)	⬇️
google/cloud/bigtable/async_read_stream_test.cc	97.32% <0.00%> (-0.67%)	⬇️
...le/cloud/storage/internal/curl_download_request.cc	88.62% <0.00%> (-0.34%)	⬇️
google/cloud/pubsub/samples/samples.cc	87.01% <0.00%> (-0.15%)	⬇️
...cloud/pubsub/internal/subscription_session_test.cc	98.83% <0.00%> (+0.16%)	⬆️
...bigtable/examples/bigtable_hello_instance_admin.cc	83.00% <0.00%> (+2.00%)	⬆️
google/cloud/spanner/internal/session_pool.cc	90.20% <0.00%> (+2.09%)	⬆️
... and 1 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.