[Bug] Fix default dbt target decision policy

[wcchang1115]

PR checklist

• Ensure you have added or ran the appropriate tests for your PR.
• DCO signed

What type of PR is this?
bug

What this PR does / why we need it:

• fix how piperider decides dbt default target

Which issue(s) this PR fixes:
sc-32560

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[codecov]

Codecov Report

Merging #926 (3b00169) into main (02b474b) will increase coverage by 0.01%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #926      +/-   ##
==========================================
+ Coverage   48.48%   48.50%   +0.01%     
==========================================
  Files          63       63              
  Lines        9066     9067       +1     
==========================================
+ Hits         4396     4398       +2     
+ Misses       4670     4669       -1     

Files	Coverage Δ
piperider_cli/configuration.py	60.17% <100.00%> (+0.25%)	⬆️

... and 2 files with indirect coverage changes

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[kentwelcome]

LGTM