Use postgres for playwright testing

[SchrodingersGat]

• Should reduce issues with parallel tests

[netlify]

✅ Deploy Preview for inventree-web-pui-preview canceled.

Name	Link
🔨 Latest commit	dd06243
🔍 Latest deploy log	https://app.netlify.com/sites/inventree-web-pui-preview/deploys/67b59ed763f0e200086101ad

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.04%. Comparing base (7e7f745) to head (dd06243).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9104      +/-   ##
==========================================
- Coverage   86.07%   86.04%   -0.04%     
==========================================
  Files        1177     1176       -1     
  Lines       51927    51902      -25     
  Branches     2120     2120              
==========================================
- Hits        44697    44659      -38     
- Misses       6680     6702      +22     
+ Partials      550      541       -9     

Flag	Coverage Δ
backend	88.07% <ø> (+<0.01%)	⬆️
migrations	42.91% <ø> (-0.11%)	⬇️
pui	68.81% <ø> (-0.32%)	⬇️

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