fix(schema-compiler): Fix BigQuery queries datetime/timestamp comparisons

[KSDaemon]

This is an attempt to fix BigQuery queries that fail with:

Error: No matching signature for operator < for argument types: DATETIME, TIMESTAMP
  Signature: T1 < T1
    Unable to find common supertype for templated argument <T1>
      Input types for <T1>: {TIMESTAMP, DATETIME} at [6:85]

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.17%. Comparing base (17570d4) to head (c0972cd).
Report is 11 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #9683       +/-   ##
===========================================
+ Coverage        0   84.17%   +84.17%     
===========================================
  Files           0      230      +230     
  Lines           0    85112    +85112     
===========================================
+ Hits            0    71639    +71639     
- Misses          0    13473    +13473     

Flag	Coverage Δ
cubesql	84.17% <ø> (?)

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