fix(data-masking): fail closed on masking errors

[leandrodamascena]

Issue number: closes #8445

Summary

fail closed on masking errors

Changes

Please provide a summary of what's being changed

User experience

Please share what the user experience looks like before and after this change

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[powertools-for-aws-oss-automation]

Referenced issues are closed or don't exist. Please ensure there is an open issue related to this change to avoid significant delays or closure.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.64%. Comparing base (a39e101) to head (3a7e649).
⚠️ Report is 5 commits behind head on develop.

Files with missing lines	Patch %	Lines
...s_lambda_powertools/utilities/data_masking/base.py	85.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8446      +/-   ##
===========================================
- Coverage    96.65%   96.64%   -0.02%     
===========================================
  Files          296      296              
  Lines        14767    14771       +4     
  Branches      1246     1247       +1     
===========================================
+ Hits         14273    14275       +2     
- Misses         359      361       +2     
  Partials       135      135              

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