feat: Admin Sales Page Export table as CSV

[ranjitkshah]

Fixes #7573
reqd#fossasia/open-event-server#8118

Short description of what this resolves:

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

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[codecov]

Codecov Report

Merging #7625 (752178e) into development (e4681bb) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           development    #7625      +/-   ##
===============================================
- Coverage        18.67%   18.62%   -0.05%     
===============================================
  Files              610      610              
  Lines             7143     7161      +18     
  Branches           149      149              
===============================================
  Hits              1334     1334              
- Misses            5782     5800      +18     
  Partials            27       27              

Impacted Files	Coverage Δ
app/controllers/admin/sales/index.js	9.52% <0.00%> (-57.15%)	⬇️
app/controllers/events/view/sessions.js	0.00% <0.00%> (ø)

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[mariobehling]

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