feat: update payment status from admin panel

[maze-runnar]

Fixes fossasia/open-event-frontend#7540

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.

[MeghalBisht]

@maze-runnar do we need migrations here?

[maze-runnar]

@maze-runnar do we need migrations here?

No , as we are allowing none so it is not req.if we move from allow none to req then it will be required

[ranjitkshah]

@maze-runnar tests

[codecov]

Codecov Report

Merging #8102 (86489b7) into development (78e3732) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##           development    #8102   +/-   ##
============================================
  Coverage        66.54%   66.54%           
============================================
  Files              302      302           
  Lines            15462    15462           
============================================
  Hits             10289    10289           
  Misses            5173     5173           

Impacted Files	Coverage Δ
app/api/event_invoices.py	64.28% <ø> (ø)
app/api/schema/event_invoices.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 78e3732...86489b7. Read the comment docs.