Fee per user fixes

[rokn]

Detailed description: Fixes read only not calculating with fee policies. Fixes burn event not being handled

Special notes for your reviewer: I've added the fee policy service in the fee calculator so now only the fee calculator is used.

Checklist

• [ ] Documentation added
• [ ] Tests updated

[codecov[bot]]

Codecov Report

Merging #870 (e7b77c9) into main (1983b87) will decrease coverage by 0.06%. The diff coverage is 55.00%.

@@            Coverage Diff             @@
##             main     #870      +/-   ##
==========================================
- Coverage   64.19%   64.13%   -0.06%     
==========================================
  Files          88       88              
  Lines        6787     6798      +11     
==========================================
+ Hits         4357     4360       +3     
- Misses       2209     2216       +7     
- Partials      221      222       +1     

Flag	Coverage Δ
unittests	64.13% <55.00%> (-0.06%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../process/handler/read-only/fee-transfer/handler.go	17.10% <0.00%> (ø)
app/services/fee/calculator/calculator.go	58.69% <42.85%> (-10.75%)	:arrow_down:
...edera/mirror-node/model/transaction/transaction.go	100.00% <100.00%> (ø)
app/process/handler/read-only/fee/handler.go	42.85% <100.00%> (ø)
app/services/burn-event/service.go	69.25% <100.00%> (ø)

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[rokn]

Closing this as it's part of #877