Remove low-level fields from methods that return iterators

[nfx]

Follow up to databricks/databricks-sdk-go#569 and databricks/cli#647

TBD: we need a bit better way to tell that request is a request class.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.25% 🎉

Comparison is base (b82fa01) 52.55% compared to head (22faf72) 52.81%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #279      +/-   ##
==========================================
+ Coverage   52.55%   52.81%   +0.25%     
==========================================
  Files          33       33              
  Lines       19823    19879      +56     
==========================================
+ Hits        10418    10499      +81     
+ Misses       9405     9380      -25     

Files Changed	Coverage Δ
databricks/sdk/service/catalog.py	51.83% <100.00%> (+0.29%)	⬆️
databricks/sdk/service/compute.py	52.23% <100.00%> (+0.06%)	⬆️
databricks/sdk/service/jobs.py	55.29% <100.00%> (+0.43%)	⬆️
databricks/sdk/service/ml.py	49.83% <100.00%> (+0.81%)	⬆️
databricks/sdk/service/pipelines.py	50.86% <100.00%> (+0.69%)	⬆️
databricks/sdk/service/sql.py	54.98% <100.00%> (+0.44%)	⬆️
databricks/sdk/service/workspace.py	51.90% <100.00%> (+0.23%)	⬆️

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