fix: correct type inference for props when initialProps is used

[pierrezimmermannbam]

Summary

Fixes #1420

Because we were using conditionals in RenderHookOptions and the way Typescript works with conditionals, Props type was inferred too strictly. For instance when doing:

 renderHook(
    (num: number | undefined) => useMyHook(num),
    {
      initialProps: 5,
    }
  );

Props type would be infered as 5 and not number | undefined which would be the expected type.

This PR fixes this issue by removing the use of the conditional. This doesn't change much the behavior and it aligns with the types from testing library react hooks and react testing library

Test plan

I added a test case to check that the type is inferred correctly

[mdjastrzebski]

@pierrezimmermannbam looks good. I've suggested some minor changes based on RTL's typing.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01 🎉

Comparison is base (8c22290) 96.88% compared to head (da2e542) 96.89%.

❗ Current head da2e542 differs from pull request most recent head c5d1e47. Consider uploading reports for the commit c5d1e47 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1421      +/-   ##
==========================================
+ Coverage   96.88%   96.89%   +0.01%     
==========================================
  Files          65       65              
  Lines        3693     3705      +12     
  Branches      538      539       +1     
==========================================
+ Hits         3578     3590      +12     
  Misses        115      115              

Impacted Files	Coverage Δ
src/renderHook.tsx	100.00% <100.00%> (ø)

... and 3 files with indirect coverage changes

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[mdjastrzebski]

Looks good, let's merge!

[mdjastrzebski]

This PR has been released in v12.1.3 🚢