[Geneva Exporter] Add MSI Auth support (draft for feasibility test)

[lalitb]

Fixes #
Design discussion issue (if applicable) #

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

❌ Patch coverage is 28.46715% with 490 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.4%. Comparing base (6b2d4c1) to head (1e42374).
⚠️ Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
...try-exporter-geneva/geneva-uploader/src/msi/mod.rs	0.0%	272 Missing ⚠️
...eneva/geneva-uploader/src/config_service/client.rs	4.4%	85 Missing ⚠️
...try-exporter-geneva/geneva-uploader/src/msi/ffi.rs	14.2%	66 Missing ⚠️
...etry-exporter-geneva/geneva-uploader/src/client.rs	0.0%	28 Missing ⚠️
...y-exporter-geneva/geneva-uploader/src/msi/error.rs	65.9%	15 Missing ⚠️
...y-exporter-geneva/geneva-uploader/src/msi/types.rs	89.5%	15 Missing ⚠️
...ter-geneva/geneva-uploader/src/msi/token_source.rs	65.3%	9 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #386     +/-   ##
=======================================
- Coverage   48.2%   46.4%   -1.9%     
=======================================
  Files         69      74      +5     
  Lines       9586   10397    +811     
=======================================
+ Hits        4626    4826    +200     
- Misses      4960    5571    +611     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.