chore!(backend-shared): make CUBEJS_TRANSPILATION_WORKER_THREADS=true by default

[KSDaemon]

• make CUBEJS_TRANSPILATION_WORKER_THREADS=true by default
• cleanup push CI wf

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.11%. Comparing base (cb6dc3e) to head (b029c10).
⚠️ Report is 10 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (cb6dc3e) and HEAD (b029c10). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (cb6dc3e)	HEAD (b029c10)
cubesql	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #10097       +/-   ##
===========================================
- Coverage   83.34%   49.11%   -34.23%     
===========================================
  Files         244      196       -48     
  Lines       74112    15965    -58147     
  Branches        0     3133     +3133     
===========================================
- Hits        61767     7842    -53925     
+ Misses      12345     7730     -4615     
- Partials        0      393      +393     

Flag	Coverage Δ
cube-backend	49.11% <ø> (?)
cubesql	?

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