hackily move apply_order_by function clause generation to adapter

[woylie]

relates to #238

[codecov]

Codecov Report

Patch coverage: 80.00% and project coverage change: -0.22 ⚠️

Comparison is base (dae56b2) 87.75% compared to head (a895060) 87.54%.

❗ Current head a895060 differs from pull request most recent head 7b08cb7. Consider uploading reports for the commit 7b08cb7 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #385      +/-   ##
==========================================
- Coverage   87.75%   87.54%   -0.22%     
==========================================
  Files          15       15              
  Lines         874      867       -7     
==========================================
- Hits          767      759       -8     
- Misses        107      108       +1     

Impacted Files	Coverage Δ
lib/flop/schema.ex	96.38% <75.00%> (-1.40%)	⬇️
lib/flop/adapter/ecto.ex	94.66% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.