feat(cubeclient): Add hierarchies to Cube meta

[MazterQyou]

Check List

• Tests have been run in packages where changes made if available
• Linter has been run for changed code
• Tests for the changes have been added if not covered yet
• Docs have been added / updated if required

Description of Changes Made

This PR updates open spec and generated files, adding hierarchies to meta in cubeclient, exposing them to cubesql and dependencies.

[codecov]

Codecov Report

Attention: Patch coverage is 52.94118% with 8 lines in your changes missing coverage. Please review.

Project coverage is 83.34%. Comparing base (4c8de88) to head (98c2fca).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...ql/cubeclient/src/models/v1_cube_meta_hierarchy.rs	0.00%	7 Missing ⚠️
rust/cubesql/cubeclient/src/models/v1_cube_meta.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9180      +/-   ##
==========================================
- Coverage   83.35%   83.34%   -0.01%     
==========================================
  Files         226      227       +1     
  Lines       81045    81062      +17     
==========================================
+ Hits        67552    67561       +9     
- Misses      13493    13501       +8     

Flag	Coverage Δ
cubesql	83.34% <52.94%> (-0.01%)	⬇️

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