fix: Expand order access to ticket holders

[iamareebjamal]

Fixes #7396

[codecov]

Codecov Report

Merging #7395 into development will increase coverage by 0.03%.
The diff coverage is 54.54%.

@@               Coverage Diff               @@
##           development    #7395      +/-   ##
===============================================
+ Coverage        64.54%   64.57%   +0.03%     
===============================================
  Files              262      262              
  Lines            13252    13249       -3     
===============================================
+ Hits              8553     8556       +3     
+ Misses            4699     4693       -6     

Impacted Files	Coverage Δ
app/api/custom/orders.py	37.71% <0.00%> (ø)
app/models/user.py	65.63% <ø> (+0.86%)	⬆️
app/api/attendees.py	51.63% <50.00%> (+0.39%)	⬆️
app/api/custom/invoices.py	36.17% <50.00%> (+1.38%)	⬆️
app/api/orders.py	41.29% <66.66%> (+0.31%)	⬆️
app/models/order.py	90.41% <66.66%> (-1.02%)	⬇️

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