[MAINTENANCE] update_datasource returns the updated datasource

[tyler-hoffman]

Part of the work for #10155.

The resulting datasource will have ids on the nested models. This facilitates datasource.add_batch_definition returning fully formed BatchDefinitions.

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• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
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• Appropriate tests and docs have been updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.78%. Comparing base (2adc446) to head (3ba5d7d).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #10170   +/-   ##
========================================
  Coverage    78.77%   78.78%           
========================================
  Files          456      456           
  Lines        39725    39722    -3     
========================================
- Hits         31295    31293    -2     
+ Misses        8430     8429    -1     

Flag	Coverage Δ
3.10	65.76% <100.00%> (-0.01%)	⬇️
3.10 big	?
3.10 databricks	?
3.10 filesystem	?
3.10 mysql	?
3.10 postgresql	?
3.10 snowflake	?
3.10 spark	?
3.10 trino	?
3.11	65.76% <100.00%> (-0.01%)	⬇️
3.11 aws_deps	?
3.11 big	?
3.11 databricks	?
3.11 filesystem	?
3.11 mysql	?
3.11 snowflake	?
3.11 trino	?
3.12	64.32% <100.00%> (-0.01%)	⬇️
3.12 aws_deps	45.54% <100.00%> (-0.01%)	⬇️
3.12 big	54.26% <100.00%> (-0.01%)	⬇️
3.12 filesystem	60.04% <100.00%> (-0.01%)	⬇️
3.12 mysql	49.71% <0.00%> (+<0.01%)	⬆️
3.12 postgresql	53.85% <100.00%> (-0.01%)	⬇️
3.12 spark	57.00% <100.00%> (-0.01%)	⬇️
3.12 trino	51.77% <100.00%> (-0.01%)	⬇️
3.8	65.80% <100.00%> (-0.01%)	⬇️
3.8 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	54.27% <100.00%> (-0.01%)	⬇️
3.8 aws_deps	45.57% <100.00%> (-0.01%)	⬇️
3.8 big	54.28% <100.00%> (-0.01%)	⬇️
3.8 databricks	46.72% <100.00%> (-0.01%)	⬇️
3.8 filesystem	60.05% <100.00%> (-0.01%)	⬇️
3.8 mysql	49.69% <0.00%> (+<0.01%)	⬆️
3.8 postgresql	53.84% <100.00%> (-0.01%)	⬇️
3.8 snowflake	47.64% <100.00%> (-0.01%)	⬇️
3.8 spark	56.97% <100.00%> (-0.01%)	⬇️
3.8 trino	51.76% <100.00%> (-0.01%)	⬇️
3.9	65.78% <100.00%> (-0.01%)	⬇️
3.9 aws_deps	?
3.9 big	?
3.9 databricks	?
3.9 filesystem	?
3.9 mysql	?
3.9 postgresql	?
3.9 snowflake	?
3.9 trino	?
cloud	0.00% <0.00%> (ø)
docs-spark	48.41% <100.00%> (-0.01%)	⬇️

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