chore: Reduce eslint overrides

[iamareebjamal]

• Reduce ESLint overrides
• Switch from let to const

[vercel]

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[codecov]

Codecov Report

Merging #4764 into development will not change coverage.
The diff coverage is 16.38%.

@@             Coverage Diff              @@
##           development    #4764   +/-   ##
============================================
  Coverage        22.86%   22.86%           
============================================
  Files              478      478           
  Lines             5051     5051           
  Branches             8        8           
============================================
  Hits              1155     1155           
  Misses            3895     3895           
  Partials             1        1           

Impacted Files	Coverage Δ
app/components/account/application-section.js	6.25% <0.00%> (ø)
app/components/create-session-message.js	0.00% <0.00%> (ø)
app/components/events/view/export/api-response.js	27.27% <0.00%> (ø)
...n/settings/system/mail-settings/test-email-form.js	12.50% <0.00%> (ø)
...omponents/forms/admin/settings/ticket-fees-form.js	0.00% <0.00%> (ø)
...components/forms/events/view/create-access-code.js	0.00% <0.00%> (ø)
...mponents/forms/events/view/create-discount-code.js	0.00% <0.00%> (ø)
app/components/forms/orders/order-form.js	0.00% <0.00%> (ø)
app/components/forms/session-speaker-form.js	0.00% <0.00%> (ø)
app/components/forms/wizard/sponsors-step.js	0.00% <0.00%> (ø)
... and 105 more

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