Remove allowed directories check on additional OTel config paths

[aphralG]

Proposed changes

Remove allowed directories check from additional OTel config paths provided in the Agent config

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.30%. Comparing base (61f1fc8) to head (341a6ed).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1380      +/-   ##
==========================================
+ Coverage   86.29%   86.30%   +0.01%     
==========================================
  Files         102      102              
  Lines       12580    12575       -5     
==========================================
- Hits        10856    10853       -3     
+ Misses       1248     1247       -1     
+ Partials      476      475       -1     

Files with missing lines	Coverage Δ
internal/config/types.go	87.65% <ø> (+1.60%)	⬆️

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