fix: remove litellm and transitive dependents (quarantined on PyPI)

[ogabrielluiz]

Summary

• litellm has been quarantined on PyPI, blocking all fresh installs
• Removed litellm and all packages that transitively depend on it: astra-assistants, dspy-ai, agent-lifecycle-toolkit, opik
• Replaced the direct import litellm in crewai crew.py with a generic exception catch
• Component code is left intact -- it simply won't load when the packages aren't installed

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✅ Migration Validation Passed

All migrations follow the Expand-Contract pattern correctly.

[github-actions]

Frontend Unit Test Coverage Report

Coverage Summary

Lines	Statements	Branches	Functions
	23.49% (8246/35103)	16.2% (4466/27557)	16.26% (1200/7376)

Unit Test Results

Tests	Skipped	Failures	Errors	Time
2723	0 💤	0 ❌	0 🔥	46.253s ⏱️

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 37.50%. Comparing base (63ad0ec) to head (0ee8929).

Files with missing lines	Patch %	Lines
src/lfx/src/lfx/base/agents/crewai/crew.py	0.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (40.00%). You can increase the patch coverage or adjust the target coverage.
❌ Your project status has failed because the head coverage (41.78%) is below the target coverage (60.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-1.8.3   #12302      +/-   ##
=================================================
+ Coverage          37.46%   37.50%   +0.04%     
=================================================
  Files               1593     1593              
  Lines              78398    78397       -1     
  Branches           11890    11890              
=================================================
+ Hits               29368    29404      +36     
+ Misses             47356    47319      -37     
  Partials            1674     1674              

Flag	Coverage Δ
frontend	21.05% <ø> (ø)
lfx	41.78% <0.00%> (+0.15%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/lfx/src/lfx/base/agents/crewai/crew.py	21.36% <0.00%> (+18.82%)	⬆️

... and 2 files with indirect coverage changes

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