fix(cubejs-native): sql over http drop sessions, correct error

[vasilev-alex]

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

Issue Reference this PR resolves

[For example #12]

Description of Changes Made (if issue reference is not provided)

[Description goes here]

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.69%. Comparing base (73fbfaa) to head (a6b96cd).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
rust/cubesql/cubesql/src/compile/plan.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9297   +/-   ##
=======================================
  Coverage   83.69%   83.69%           
=======================================
  Files         228      228           
  Lines       82016    82016           
=======================================
  Hits        68640    68640           
  Misses      13376    13376           

Flag	Coverage Δ
cubesql	83.69% <0.00%> (ø)

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