Ensure Unmanaged Field Is Stored Correctly In Manifest

[aphralG]

Proposed changes

If config applys were preformed in quick succession there was a chance that unmanaged files would be marked as managed.
This updates the resource plugin so that when it creates the config context it then reads the manifest to determine what files are unmanaged and updates them in the config context.

Also fixes issue where file watcher wasn't properly disabled.

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 39.28571% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.29%. Comparing base (98514ea) to head (f0fee76).

Files with missing lines	Patch %	Lines
internal/resource/resource_service.go	37.50%	14 Missing and 1 partial ⚠️
internal/watcher/file/file_watcher_service.go	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1417      +/-   ##
==========================================
- Coverage   86.39%   86.29%   -0.11%     
==========================================
  Files         102      102              
  Lines       12622    12649      +27     
==========================================
+ Hits        10905    10915      +10     
- Misses       1236     1251      +15     
- Partials      481      483       +2     

Files with missing lines	Coverage Δ
internal/watcher/file/file_watcher_service.go	81.29% <50.00%> (-0.95%)	⬇️
internal/resource/resource_service.go	62.80% <37.50%> (-2.69%)	⬇️

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[Akshay2191]

Can we add test for this?