fix: remove keyspace from column during query builder

[harshit-gangal]

Description

This PR removes the keyspace information from the final query sent down to vttablet for execution as the database name and keyspace name can be different.

This was caused by to recent change in fixing the order by, group by and having clause column resolution logic to match the MySQL rules.

Related Issue(s)

• Fixes Bug Report: Some query with filter fails since v19.0.0 #15499

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

[vitess-bot]

Review Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.70%. Comparing base (61db2db) to head (0edaab0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15514      +/-   ##
==========================================
+ Coverage   65.69%   65.70%   +0.01%     
==========================================
  Files        1564     1562       -2     
  Lines      194588   194438     -150     
==========================================
- Hits       127832   127753      -79     
+ Misses      66756    66685      -71     

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[arthurschreiber]

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