feat: Show complex custom form values for attendee info

[Haider8]

Fixes #4519

Short description of what this resolves:

Complex custom form values was not visible in attendee information.

Changes proposed in this pull request:

Make complex custom form values visible by checking if that particular field is complex or not.

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 #4548 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #4548   +/-   ##
============================================
  Coverage        22.26%   22.26%           
============================================
  Files              471      471           
  Lines             4962     4962           
  Branches             8        8           
============================================
  Hits              1105     1105           
  Misses            3856     3856           
  Partials             1        1           

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[Haider8]

@iamareebjamal Please review