Ensure in progress requests are processed before resetting the gRPC connection with the management plane

[dhurley]

Proposed changes

Ensure in progress requests are processed before resetting the gRPC connection with the management plane.

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 90.47619% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.25%. Comparing base (e2ad230) to head (b37a0b8).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/command/command_plugin.go	50.00%	2 Missing and 1 partial ⚠️
internal/command/command_service.go	91.66%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1391      +/-   ##
==========================================
+ Coverage   85.17%   85.25%   +0.08%     
==========================================
  Files         102      102              
  Lines       12928    12972      +44     
==========================================
+ Hits        11011    11059      +48     
+ Misses       1433     1426       -7     
- Partials      484      487       +3     

Files with missing lines	Coverage Δ
internal/config/config.go	87.44% <100.00%> (+0.06%)	⬆️
internal/config/defaults.go	100.00% <ø> (ø)
internal/config/flags.go	100.00% <ø> (ø)
internal/config/types.go	87.65% <ø> (ø)
...ternal/resource/nginx_instance_process_operator.go	61.76% <100.00%> (ø)
internal/watcher/instance/nginx_process_parser.go	91.66% <100.00%> (+0.89%)	⬆️
internal/command/command_plugin.go	73.79% <50.00%> (ø)
internal/command/command_service.go	79.82% <91.66%> (+0.56%)	⬆️

... and 6 files with indirect coverage changes

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[sean-breen]

Could you add some tests around the case where len(cs.requestsInProgress) > 0?