Remove creating metadata if it is a extern function

[warunalakshitha]

Purpose

Examples

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility
• Checked the impact on OpenAPI generation

[sonarcloud]

Quality Gate passed

Issues
0 New issues
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

All modified and coverable lines are covered by tests ✅

Project coverage is 79.89%. Comparing base (9551ecd) to head (0cbbf06).
Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2227      +/-   ##
============================================
- Coverage     80.42%   79.89%   -0.53%     
- Complexity        0      678     +678     
============================================
  Files           366      417      +51     
  Lines         20734    23099    +2365     
  Branches       3288     3746     +458     
============================================
+ Hits          16676    18456    +1780     
- Misses         3127     3512     +385     
- Partials        931     1131     +200     

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