AddressNL component validation triggers on page load

[robinmolen]

Partly closes: open-formulieren/open-forms#4699

This is regarding one of the issues described in the OF#4699 ticket:

Sometimes the component validation triggers right after loading. The best way i can trigger this, is by making the component required and opening the frontend in incognito

The problem that caused this issues, was the default value of the addressNL component. This didn't conform to the expected value, which triggered a validation even before the user touched the form.

By setting the default value to an empty address this initial validation doesn't trigger

[codecov]

Bundle Report

Changes will increase total bundle size by 36 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
@open-formulieren/sdk-OpenForms-umd	4.75MB	18 bytes (0.0%) ⬆️
@open-formulieren/sdk-esm	4.75MB	18 bytes (0.0%) ⬆️

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.81%. Comparing base (49bd7cb) to head (61f1a7f).
Report is 23 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #785      +/-   ##
==========================================
+ Coverage   83.32%   83.81%   +0.48%     
==========================================
  Files         239      239              
  Lines        4750     4750              
  Branches     1268     1275       +7     
==========================================
+ Hits         3958     3981      +23     
+ Misses        757      734      -23     
  Partials       35       35              

Flag	Coverage Δ
storybook	76.31% <100.00%> (+0.54%)	⬆️
vitest	62.64% <0.00%> (ø)

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