POC: POC branch for external file implementation using cloud auth

[Akshay2191]

Did a POC to see the imports required to add the file fetching and auth features directly in Agent code for 3 cloud providers
AWS,Azure,GCP

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

❌ Patch coverage is 34.02778% with 95 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (external-file-mgmt-integration@fb3b613). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
internal/file/file_manager_service.go	34.02%	91 Missing and 4 partials ⚠️

Additional details and impacted files

@@                        Coverage Diff                        @@
##             external-file-mgmt-integration    #1462   +/-   ##
=================================================================
  Coverage                                  ?   85.88%           
=================================================================
  Files                                     ?      102           
  Lines                                     ?    12882           
  Branches                                  ?        0           
=================================================================
  Hits                                      ?    11064           
  Misses                                    ?     1333           
  Partials                                  ?      485           

Files with missing lines	Coverage Δ
internal/file/file_manager_service.go	66.93% <34.02%> (ø)

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