[chore] Add repository check to tidy-dependencies workflow

[dmitryax]

Add a repository origin check to the tidy.yml workflow (with write permissions) to ensure it can't be triggered by PRs from forks.

Same as open-telemetry/opentelemetry-collector#14344

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.07%. Comparing base (32a6fbb) to head (29318ab).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1712      +/-   ##
==========================================
- Coverage   84.08%   84.07%   -0.02%     
==========================================
  Files         469      469              
  Lines      137651   137651              
==========================================
- Hits       115746   115729      -17     
- Misses      21371    21388      +17     
  Partials      534      534              

Components	Coverage Δ
otap-dataflow	85.33% <ø> (-0.02%)	⬇️
query_abstraction	80.61% <ø> (ø)
query_engine	90.39% <ø> (ø)
syslog_cef_receivers	∅ <ø> (∅)
otel-arrow-go	53.50% <ø> (ø)

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[albertlockett]

thanks @dmitryax

[cijothomas]

Thanks!