fix: ticket end-date can be only within event end-date

[codedsun]

Fixes #6646

Short description of what this resolves:

fix: ticket end-date can be within event end-date

Checklist

• I have read the Contribution & Best practices Guide and my PR follows them.
• My branch is up-to-date with the Upstream development branch.
• The unit tests 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)

• All the functions created/modified in this PR contain relevant docstrings.

[codecov]

Codecov Report

Merging #6647 into development will decrease coverage by 0.12%.
The diff coverage is 0%.

@@               Coverage Diff               @@
##           development    #6647      +/-   ##
===============================================
- Coverage        65.44%   65.32%   -0.13%     
===============================================
  Files              300      298       -2     
  Lines            15299    15246      -53     
===============================================
- Hits             10012     9959      -53     
  Misses            5287     5287

Impacted Files	Coverage Δ
app/api/tickets.py	47.16% <0%> (-1.38%)	⬇️
app/api/helpers/scheduled_jobs.py	24.39% <0%> (-4.08%)	⬇️
app/models/ticket_holder.py	78.46% <0%> (-0.65%)	⬇️
app/models/event.py	78.57% <0%> (-0.36%)	⬇️
app/__init__.py	88% <0%> (-0.24%)	⬇️
...all/integration/api/helpers/test_scheduled_jobs.py	100% <0%> (ø)	⬆️
app/factories/attendee.py	100% <0%> (ø)	⬆️
app/api/schema/__init__.py
app/extensions/shell.py
app/api/auth.py	24.15% <0%> (+0.32%)	⬆️
... and 2 more

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[codedsun]

@prateekj117 @iamareebjamal Review this. Thanks