[sc-27944] Do not populate dataset in Tableau crawler

[usefulalgorithm]

🤔 Why?

Tableau crawler populated the datasets only to set their system tags, but these system tags will conflict with existing dataset tags, and we don't want that.

This also reverts #968 , since we want the empty array to be there if no system tag is found for an entity.

🤓 What?

• Reverted [sc-28341] Populate systemTags.tags only when there are really tags #968
• Removed _init_dataset logic in Tableau crawler.

🧪 Tested?

• Crawler run locally.
• Modified unit test.

☑️ Checks

• My PR contains actual code changes, and I have updated the version number in pyproject.toml.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
11915	10616	89%	85%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
metaphor/snowflake/extractor.py	85%	🟢
metaphor/snowflake/utils.py	63%	🟢
metaphor/tableau/extractor.py	87%	🟢
TOTAL	78%	🟢

updated for commit: 9465e7f by action🐍

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.09%. Comparing base (112b153) to head (9465e7f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #979      +/-   ##
==========================================
- Coverage   89.10%   89.09%   -0.02%     
==========================================
  Files         184      184              
  Lines       11927    11915      -12     
==========================================
- Hits        10628    10616      -12     
  Misses       1299     1299              

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