feat: change sentry.origin for logs

[giortzisg]

Description

Change the sentry.origin for logging integrations to adhere to the spec.

Issues

• resolves: Ensure the Go SDK sets sentry.origin for Structured Logs according to the documentation #1108
• resolves: GO-89

[linear]

GO-89 Ensure the Go SDK sets `sentry.origin` for Structured Logs according to the documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.86%. Comparing base (9eb986d) to head (ed0b36a).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1121      +/-   ##
==========================================
- Coverage   86.93%   86.86%   -0.07%     
==========================================
  Files          60       61       +1     
  Lines        5555     5557       +2     
==========================================
- Hits         4829     4827       -2     
- Misses        540      543       +3     
- Partials      186      187       +1     

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