[16.0][IMP] rma_account: change account_move_line_id domain to make search more efficient

[JordiBForgeFlow]

Forward port of #407

[codecov-commenter]

Codecov Report

Merging #460 (ea157df) into 16.0 (b5a55ac) will increase coverage by 0.02%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             16.0     #460      +/-   ##
==========================================
+ Coverage   80.64%   80.66%   +0.01%     
==========================================
  Files         124      124              
  Lines        4835     4840       +5     
  Branches      786      787       +1     
==========================================
+ Hits         3899     3904       +5     
  Misses        722      722              
  Partials      214      214              

Files	Coverage Δ
rma_account/models/rma_order_line.py	77.01% <100.00%> (+0.73%)	⬆️

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b5a55ac...ea157df. Read the comment docs.