chore: remove default props

[MuckT]

Description

Removes instances of defaultProps as this is slated to be removed from React in a future version: facebook/react#29233. Components, where a default prop was provided, had their associated props set to optional.

Test plan

• Tested in CI.
• Sanity Check on iOS and Android.

Related issues

N/A

Backwards compatibility

Yes

Network scalability

N/A

[codecov]

Codecov Report

Attention: Patch coverage is 90.47619% with 6 lines in your changes missing coverage. Please review.

Project coverage is 89.09%. Comparing base (bfef6e8) to head (6417658).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/components/KeyboardSpacer.tsx	44.44%	5 Missing ⚠️
src/navigator/Headers.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #6461    +/-   ##
========================================
  Coverage   89.09%   89.09%            
========================================
  Files         730      730            
  Lines       31827    31840    +13     
  Branches     5771     6121   +350     
========================================
+ Hits        28355    28367    +12     
+ Misses       3426     3278   -148     
- Partials       46      195   +149     

Files with missing lines	Coverage Δ
src/components/BackButton.tsx	100.00% <100.00%> (ø)
src/components/CircleButton.tsx	100.00% <100.00%> (ø)
src/components/CurrencyDisplay.tsx	66.94% <100.00%> (-0.28%)	⬇️
src/icons/BackChevron.tsx	100.00% <100.00%> (ø)
src/icons/Backspace.tsx	100.00% <100.00%> (ø)
src/icons/BankIcon.tsx	100.00% <100.00%> (ø)
src/icons/Checkmark.tsx	100.00% <100.00%> (ø)
src/icons/ClockIcon.tsx	100.00% <100.00%> (ø)
src/icons/Envelope.tsx	100.00% <100.00%> (ø)
src/icons/Error.tsx	100.00% <100.00%> (ø)
... and 11 more

... and 63 files with indirect coverage changes

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[kathaypacific]

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