fix: tailcall generation schema for non required fields

[meskill]

Summary:
Briefly describe the changes made in this PR.

Issue Reference(s):
Fixes #... (Replace "..." with the issue number)

Build & Testing:

• I ran cargo test successfully.
• I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• I have added relevant unit & integration tests.
• I have updated the documentation accordingly.
• I have performed a self-review of my code.
• PR follows the naming convention of <type>(<optional scope>): <title>

[codecov]

Codecov Report

Attention: Patch coverage is 85.18519% with 4 lines in your changes missing coverage. Please review.

Project coverage is 86.73%. Comparing base (6ca5788) to head (b771a41).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
tailcall-typedefs-common/src/input_definition.rs	84.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3202      +/-   ##
==========================================
- Coverage   86.73%   86.73%   -0.01%     
==========================================
  Files         278      278              
  Lines       27914    27918       +4     
==========================================
+ Hits        24211    24214       +3     
- Misses       3703     3704       +1     

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[tusharmath]

Thanks!