fix(picklist): fix org response and exclude custom metadata picklists

[Rocko1204]

• fix org response when empty
• exclude custom metadata picklists (managed)

Checklist

All items have to be completed before a PR is merged

• Adhere to Contribution Guidelines
• Updates to Decision Records considered?
• Updates to documentation at DX@Scale Guide considered?
• Tested changes?
• Unit Tests new and existing passing locally?

[reviewpad]

Reviewpad Report

⚠️ Warnings

• Please link an issue to the pull request

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (6f85c61) 47.06% compared to head (02abadd) 47.06%.

❗ Current head 02abadd differs from pull request most recent head da0a757. Consider uploading reports for the commit da0a757 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1336   +/-   ##
=======================================
  Coverage   47.06%   47.06%           
=======================================
  Files          70       70           
  Lines        3096     3096           
  Branches      659      659           
=======================================
  Hits         1457     1457           
  Misses       1614     1614           
  Partials       25       25           

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