Added federated query

[nfx]

Small refactoring to enable things like:

• Add databricks labs ucx validate-table-locations command #673

[codecov]

Codecov Report

Attention: Patch coverage is 52.63158% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 89.27%. Comparing base (464b52c) to head (584ce49).

Files	Patch %	Lines
src/databricks/labs/ucx/account/aggregate.py	52.63%	8 Missing and 1 partial ⚠️

Additional details and impacted files

@@                       Coverage Diff                        @@
##           feature/aggregate_ucx_output    #1609      +/-   ##
================================================================
- Coverage                         89.31%   89.27%   -0.04%     
================================================================
  Files                                81       82       +1     
  Lines                             10077    10102      +25     
  Branches                           1799     1798       -1     
================================================================
+ Hits                               9000     9019      +19     
- Misses                              702      707       +5     
- Partials                            375      376       +1     

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[github-actions]

✅ 156/156 passed, 23 skipped, 2h19m51s total

_{Running from acceptance #2823}