chore: [PE-786] CGN update support fields optional

[LeleDallas]

Short description

Warning

To test it you need this pagopa/io-dev-api-server#460

This pull request includes updates to a script and a navigation route in the codebase

List of changes proposed in this pull request

• Updated IO_BACKEND_VERSION from v16.7.3-RELEASE to v16.7.4-RELEASE
• Changed the navigation route in the onPress function from a string literal to a constant defined in CGN_ROUTES

How to test

Ensure that CGN works without regression

[github-actions]

PR Title Validation for conventional commit type

✅ All good! PR title follows the conventional commit type.

[github-actions]

Jira Pull Request Link

This Pull Request refers to Jira issues:

• PE-786

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 49.68%. Comparing base (32b1437) to head (12497a7).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...n/screens/merchants/CgnMerchantsListByCategory.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6647   +/-   ##
=======================================
  Coverage   49.68%   49.68%           
=======================================
  Files        1543     1543           
  Lines       32136    32136           
  Branches     7282     7239   -43     
=======================================
  Hits        15968    15968           
+ Misses      16130    16129    -1     
- Partials       38       39    +1     

Files with missing lines	Coverage Δ
...n/screens/merchants/CgnMerchantsListByCategory.tsx	1.53% <0.00%> (ø)

... and 1 file with indirect coverage changes

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[Hantex9]

LGTM!